diff --git a/extra/bubble-chamber/bubble-chamber.factor b/extra/bubble-chamber/bubble-chamber.factor
new file mode 100644
index 0000000000..d88c53c99f
--- /dev/null
+++ b/extra/bubble-chamber/bubble-chamber.factor
@@ -0,0 +1,577 @@
+
+USING: kernel syntax accessors sequences
+       arrays calendar
+       combinators.cleave combinators.short-circuit 
+       locals math math.constants math.functions math.libm
+       math.order math.points math.vectors
+       namespaces random sequences threads ui ui.gadgets ui.gestures
+       math.ranges
+       colors
+       colors.gray
+       vars
+       multi-methods
+       multi-method-syntax
+       processing.shapes
+       frame-buffer ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+IN: bubble-chamber
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+! This is a Factor implementation of an art piece by Jared Tarbell:
+!
+!   http://complexification.net/gallery/machines/bubblechamber/
+!
+! Jared's version is written in Processing (Java)
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+! processing
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: 2random ( a b -- num ) 2dup swap - 100 / <range> random ;
+
+: 1random ( b -- num ) 0 swap 2random ;
+
+: at-fraction ( seq fraction -- val ) over length 1- * swap nth ;
+
+: at-fraction-of ( fraction seq -- val ) swap at-fraction ;
+
+: mouse ( -- point ) hand-loc get ;
+
+: mouse-x ( -- x ) mouse first  ;
+: mouse-y ( -- y ) mouse second ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+! bubble-chamber.particle
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+GENERIC: collide ( particle -- )
+GENERIC: move    ( particle -- )
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+TUPLE: particle
+  bubble-chamber pos vel speed speed-d theta theta-d theta-dd myc mya ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: initialize-particle ( particle -- particle )
+
+  0 0 {2} >>pos
+  0 0 {2} >>vel
+
+  0 >>speed
+  0 >>speed-d
+  0 >>theta
+  0 >>theta-d
+  0 >>theta-dd
+
+  0 0 0 1 rgba boa >>myc
+  0 0 0 1 rgba boa >>mya ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: center ( particle -- point ) bubble-chamber>> size>> 2 v/n ;
+
+DEFER: collision-theta
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: move-by ( obj delta -- obj ) over pos>> v+ >>pos ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: theta-dd-small? ( par limit -- par ? ) >r dup theta-dd>> abs r> < ;
+
+: random-theta-dd  ( par a b -- par ) 2random >>theta-dd ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: turn ( particle -- particle )
+  dup
+    [ speed>> ] [ theta>> { sin cos } <arr> ] bi n*v
+  >>vel ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: step-theta     ( p -- p ) [ ] [ theta>>   ] [ theta-d>>  ] tri + >>theta   ;
+: step-theta-d   ( p -- p ) [ ] [ theta-d>> ] [ theta-dd>> ] tri + >>theta-d ;
+: step-speed-sub ( p -- p ) [ ] [ speed>>   ] [ speed-d>>  ] tri - >>speed   ;
+: step-speed-mul ( p -- p ) [ ] [ speed>>   ] [ speed-d>>  ] tri * >>speed   ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+:: out-of-bounds? ( PARTICLE -- ? )
+  [let | X      [ PARTICLE pos>> first                    ]
+         Y      [ PARTICLE pos>> second                   ]
+         WIDTH  [ PARTICLE bubble-chamber>> size>> first  ]
+         HEIGHT [ PARTICLE bubble-chamber>> size>> second ] |
+
+    [let | LEFT   [ WIDTH  neg ]
+           RIGHT  [ WIDTH  2 * ]
+           BOTTOM [ HEIGHT neg ]
+           TOP    [ HEIGHT 2 * ] |
+
+      { [ X LEFT < ] [ X RIGHT > ] [ Y BOTTOM < ] [ Y TOP > ] } 0|| ] ] ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+! bubble-chamber.particle.axion
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+TUPLE: <axion> < particle ;
+
+: axion ( -- <axion> ) <axion> new initialize-particle ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+METHOD: collide ( <axion> -- )
+
+  dup center          >>pos
+  2 pi *      1random >>theta
+  1.0   6.0   2random >>speed
+  0.998 1.000 2random >>speed-d
+  0                   >>theta-d
+  0                   >>theta-dd
+
+  [ 0.00001 theta-dd-small? ] [ -0.001 0.001 random-theta-dd ] [ ] while
+
+  drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: dy>alpha ( dy -- alpha ) neg 6 * 30 + 255.0 / ;
+
+! : axion-white ( dy -- dy ) dup 1 swap dy>alpha {2} \ stroke-color set ;
+! : axion-black ( dy -- dy ) dup 0 swap dy>alpha {2} \ stroke-color set ;
+
+: axion-white ( dy -- dy ) dup 1 swap dy>alpha gray boa \ stroke-color set ;
+: axion-black ( dy -- dy ) dup 0 swap dy>alpha gray boa \ stroke-color set ;
+
+: axion-point- ( particle dy -- particle ) >r dup pos>> r> v-y point ;
+: axion-point+ ( particle dy -- particle ) >r dup pos>> r> v+y point ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+METHOD: move ( <axion> -- )
+
+  T{ gray f 0.06 0.59 } \ stroke-color set
+  dup pos>>  point
+
+  1 4 [a,b] [ axion-white axion-point- ] each
+  1 4 [a,b] [ axion-black axion-point+ ] each
+
+  dup vel>> move-by
+
+  turn
+
+  step-theta
+  step-theta-d
+  step-speed-mul
+
+  [ ] [ speed-d>> 0.9999 * ] bi >>speed-d
+
+  1000 random 996 >
+    [
+      dup speed>>   neg     >>speed
+      dup speed-d>> neg 2 + >>speed-d
+
+      100 random 30 > [ collide ] [ drop ] if
+    ]
+    [ drop ]
+  if ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+! bubble-chamber.particle.hadron
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+TUPLE: <hadron> < particle ;
+
+: hadron ( -- <hadron> ) <hadron> new initialize-particle ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+METHOD: collide ( <hadron> -- )
+
+  dup center          >>pos
+  2 pi *      1random >>theta
+  0.5   3.5   2random >>speed
+  0.996 1.001 2random >>speed-d
+  0                   >>theta-d
+  0                   >>theta-dd
+
+  [ 0.00001 theta-dd-small? ] [ -0.001 0.001 random-theta-dd ] [ ] while
+
+  0 1 0 1 rgba boa >>myc
+
+  drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+METHOD: move ( <hadron> -- )
+
+  T{ gray f 1 0.11 } \ stroke-color set  dup pos>> 1 v-y point
+  T{ gray f 0 0.11 } \ stroke-color set  dup pos>> 1 v+y point
+
+  dup vel>> move-by
+
+  turn
+
+  step-theta
+  step-theta-d
+  step-speed-mul
+
+  1000 random 997 >
+    [
+      1.0     >>speed-d
+      0.00001 >>theta-dd
+
+      100 random 70 > [ dup collide ] when
+    ]
+  when
+
+  dup out-of-bounds? [ collide ] [ drop ] if ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+! bubble-chamber.particle.muon.colors
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: good-colors ( -- seq )
+  {
+    T{ rgba f 0.23 0.14 0.17 1 }
+    T{ rgba f 0.23 0.14 0.15 1 }
+    T{ rgba f 0.21 0.14 0.15 1 }
+    T{ rgba f 0.51 0.39 0.33 1 }
+    T{ rgba f 0.49 0.33 0.20 1 }
+    T{ rgba f 0.55 0.45 0.32 1 }
+    T{ rgba f 0.69 0.63 0.51 1 }
+    T{ rgba f 0.64 0.39 0.18 1 }
+    T{ rgba f 0.73 0.42 0.20 1 }
+    T{ rgba f 0.71 0.45 0.29 1 }
+    T{ rgba f 0.79 0.45 0.22 1 }
+    T{ rgba f 0.82 0.56 0.34 1 }
+    T{ rgba f 0.88 0.72 0.49 1 }
+    T{ rgba f 0.85 0.69 0.40 1 }
+    T{ rgba f 0.96 0.92 0.75 1 }
+    T{ rgba f 0.99 0.98 0.87 1 }
+    T{ rgba f 0.85 0.82 0.69 1 }
+    T{ rgba f 0.99 0.98 0.87 1 }
+    T{ rgba f 0.82 0.82 0.79 1 }
+    T{ rgba f 0.65 0.69 0.67 1 }
+    T{ rgba f 0.53 0.60 0.55 1 }
+    T{ rgba f 0.57 0.53 0.68 1 }
+    T{ rgba f 0.47 0.42 0.56 1 }
+  } ;
+
+: anti-colors ( -- seq ) good-colors <reversed> ; 
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: color-fraction ( particle -- particle fraction ) dup theta>> pi + 2 pi * / ;
+
+: set-good-color ( particle -- particle )
+  color-fraction dup 0 1 between?
+    [ good-colors at-fraction-of >>myc ]
+    [ drop ]
+  if ;
+
+: set-anti-color ( particle -- particle )
+  color-fraction dup 0 1 between?
+    [ anti-colors at-fraction-of >>mya ]
+    [ drop ]
+  if ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+! bubble-chamber.particle.muon
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+TUPLE: <muon> < particle ;
+
+: muon ( -- <muon> ) <muon> new initialize-particle ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+METHOD: collide ( <muon> -- )
+
+  dup center           >>pos
+  2 32 [a,b] random    >>speed
+  0.0001 0.001 2random >>speed-d
+
+  dup collision-theta  -0.1 0.1 2random + >>theta
+  0                                    >>theta-d
+  0                                    >>theta-dd
+
+  [ 0.001 theta-dd-small? ] [ -0.1 0.1 random-theta-dd ] [ ] while
+
+  set-good-color
+  set-anti-color
+
+  drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+METHOD: move ( <muon> -- )
+
+  [let | MUON [ ] |
+
+    [let | WIDTH [ MUON bubble-chamber>> size>> first ] |
+
+      MUON
+
+      dup myc>> 0.16 >>alpha \ stroke-color set
+      dup pos>> point
+
+      dup mya>> 0.16 >>alpha \ stroke-color set
+      dup pos>> first2 [ WIDTH swap - ] dip 2array point
+
+      dup
+      [ speed>> ] [ theta>> { sin cos } <arr> ] bi n*v
+      move-by
+
+      step-theta
+      step-theta-d
+      step-speed-sub
+
+      dup out-of-bounds? [ collide ] [ drop ] if ] ] ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+! bubble-chamber.particle.quark
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+TUPLE: <quark> < particle ;
+
+: quark ( -- <quark> ) <quark> new initialize-particle ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+METHOD: collide ( <quark> -- )
+
+  dup center                             >>pos
+  dup collision-theta -0.11 0.11 2random +  >>theta
+  0.5 3.0 2random                        >>speed
+
+  0.996 1.001 2random                    >>speed-d
+  0                                      >>theta-d
+  0                                      >>theta-dd
+
+  [ 0.00001 theta-dd-small? ] [ -0.001 0.001 random-theta-dd ] [ ] while
+
+  drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+METHOD: move ( <quark> -- )
+
+  [let | QUARK [ ] |
+
+    [let | WIDTH [ QUARK bubble-chamber>> size>> first ] |
+
+      QUARK
+    
+      dup myc>> 0.13 >>alpha \ stroke-color set
+      dup pos>>              point
+
+      dup pos>> first2 [ WIDTH swap - ] dip 2array point
+
+      [ ] [ vel>> ] bi move-by
+
+      turn
+
+      step-theta
+      step-theta-d
+      step-speed-mul
+
+      1000 random 997 >
+      [
+      dup speed>> neg    >>speed
+      2 over speed-d>> - >>speed-d
+      ]
+      when
+
+      dup out-of-bounds? [ collide ] [ drop ] if ] ] ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+USE: syntax ! Switch back to non-multi-method 'TUPLE:' syntax
+
+TUPLE: <bubble-chamber> < <frame-buffer>
+  paused particles collision-theta size ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+! : randomize-collision-theta ( bubble-chamber -- bubble-chamber )
+!   0  2 pi *  0.001  <range>  random >>collision-theta ;
+
+: randomize-collision-theta ( bubble-chamber -- bubble-chamber )
+  pi neg  pi  0.001 <range> random >>collision-theta ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: collision-theta ( particle -- theta ) bubble-chamber>> collision-theta>> ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+M: <bubble-chamber> pref-dim* ( gadget -- dim ) size>> ;
+
+M: <bubble-chamber> ungraft* ( <bubble-chamber> -- ) t >>paused drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: iterate-particle ( particle -- ) move ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+M:: <bubble-chamber> update-frame-buffer ( BUBBLE-CHAMBER -- )
+
+  BUBBLE-CHAMBER particles>> [ iterate-particle ] each ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: iterate-system ( <bubble-chamber> -- ) drop ;
+
+:: start-bubble-chamber-thread ( GADGET -- )
+  GADGET f >>paused drop
+  [
+    [
+      GADGET paused>>
+        [ f ]
+        [ GADGET iterate-system GADGET relayout-1 1 milliseconds sleep t ]
+      if
+    ]
+    loop
+  ]
+  in-thread ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: bubble-chamber ( -- <bubble-chamber> )
+  <bubble-chamber> new-gadget
+    { 1000 1000 } >>size
+    randomize-collision-theta ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: bubble-chamber-window ( -- <bubble-chamber> )
+  bubble-chamber
+    dup start-bubble-chamber-thread
+    dup "Bubble Chamber" open-window ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+:: add-particle ( BUBBLE-CHAMBER PARTICLE -- bubble-chamber )
+  
+  PARTICLE BUBBLE-CHAMBER >>bubble-chamber drop
+
+  BUBBLE-CHAMBER  BUBBLE-CHAMBER particles>> PARTICLE suffix  >>particles ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+:: mouse->collision-theta ( BUBBLE-CHAMBER -- BUBBLE-CHAMBER )
+  mouse
+  BUBBLE-CHAMBER size>> 2 v/n
+  v-
+  first2
+  fatan2
+  BUBBLE-CHAMBER (>>collision-theta)
+  BUBBLE-CHAMBER ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+:: mouse-pressed ( BUBBLE-CHAMBER -- )
+
+  BUBBLE-CHAMBER mouse->collision-theta drop
+
+  11
+  [
+    BUBBLE-CHAMBER particles>> [ <hadron>? ] filter random [ collide ] when*
+    BUBBLE-CHAMBER particles>> [ <quark>?  ] filter random [ collide ] when*
+    BUBBLE-CHAMBER particles>> [ <muon>?   ] filter random [ collide ] when*
+  ]
+  times ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+<bubble-chamber> H{ { T{ button-down } [ mouse-pressed ] } } set-gestures
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: collide-random-particle ( bubble-chamber -- bubble-chamber )
+  dup particles>> random collide ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: big-bang ( bubble-chamber -- bubble-chamber )
+  dup particles>> [ collide ] each ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+! Some initial configurations
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: ten-hadrons ( -- )
+  bubble-chamber-window
+  10 [ drop hadron add-particle ] each
+  drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: original ( -- )
+  
+  bubble-chamber-window
+  
+    1789 [ muon   add-particle ] times
+    1300 [ quark  add-particle ] times
+    1000 [ hadron add-particle ] times
+     111 [ axion  add-particle ] times
+
+    particles>>
+    [ [ <muon>?   ] filter random collide ]
+    [ [ <quark>?  ] filter random collide ]
+    [ [ <hadron>? ] filter random collide ]
+    tri ;
+    
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: hadron-chamber ( -- )
+  bubble-chamber-window
+  1000 [ hadron add-particle ] times
+  big-bang
+  drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+! Experimental
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: muon-chamber ( -- )
+  bubble-chamber-window
+  1000 [ muon add-particle ] times
+  dup particles>> [ collide randomize-collision-theta ] each
+  drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: original-big-bang ( -- )
+  bubble-chamber
+    { 1000 1000 } >>size
+    dup start-bubble-chamber-thread
+    dup "Bubble Chamber" open-window
+
+  1789 [ muon   add-particle ] times
+  1300 [ quark  add-particle ] times
+  1000 [ hadron add-particle ] times
+   111 [ axion  add-particle ] times
+
+  big-bang
+
+  drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: original-big-bang-variant ( -- )
+  bubble-chamber-window
+  1789 [ muon   add-particle ] times
+  1300 [ quark  add-particle ] times
+  1000 [ hadron add-particle ] times
+   111 [ axion  add-particle ] times
+  dup particles>> [ collide randomize-collision-theta ] each
+  drop ;
diff --git a/extra/bubble-chamber/hadron-chamber/hadron-chamber.factor b/extra/bubble-chamber/hadron-chamber/hadron-chamber.factor
new file mode 100644
index 0000000000..4046724b82
--- /dev/null
+++ b/extra/bubble-chamber/hadron-chamber/hadron-chamber.factor
@@ -0,0 +1,8 @@
+
+USING: ui bubble-chamber ;
+
+IN: bubble-chamber.hadron-chamber
+
+: main ( -- ) [ hadron-chamber ] with-ui ;
+
+MAIN: main
\ No newline at end of file
diff --git a/extra/bubble-chamber/hadron-chamber/tags.txt b/extra/bubble-chamber/hadron-chamber/tags.txt
new file mode 100644
index 0000000000..cb5fc203e1
--- /dev/null
+++ b/extra/bubble-chamber/hadron-chamber/tags.txt
@@ -0,0 +1 @@
+demos
diff --git a/extra/bubble-chamber/original/original.factor b/extra/bubble-chamber/original/original.factor
new file mode 100644
index 0000000000..4d1744eb64
--- /dev/null
+++ b/extra/bubble-chamber/original/original.factor
@@ -0,0 +1,8 @@
+
+USING: ui bubble-chamber ;
+
+IN: bubble-chamber.original
+
+: main ( -- ) [ original ] with-ui ;
+
+MAIN: main
\ No newline at end of file
diff --git a/extra/bubble-chamber/original/tags.txt b/extra/bubble-chamber/original/tags.txt
new file mode 100644
index 0000000000..cb5fc203e1
--- /dev/null
+++ b/extra/bubble-chamber/original/tags.txt
@@ -0,0 +1 @@
+demos
diff --git a/extra/bubble-chamber/ten-hadrons/tags.txt b/extra/bubble-chamber/ten-hadrons/tags.txt
new file mode 100644
index 0000000000..cb5fc203e1
--- /dev/null
+++ b/extra/bubble-chamber/ten-hadrons/tags.txt
@@ -0,0 +1 @@
+demos
diff --git a/extra/bubble-chamber/ten-hadrons/ten-hadrons.factor b/extra/bubble-chamber/ten-hadrons/ten-hadrons.factor
new file mode 100644
index 0000000000..a29ecf8990
--- /dev/null
+++ b/extra/bubble-chamber/ten-hadrons/ten-hadrons.factor
@@ -0,0 +1,8 @@
+
+USING: ui bubble-chamber ;
+
+IN: bubble-chamber.ten-hadrons
+
+: main ( -- ) [ ten-hadrons ] with-ui ;
+
+MAIN: main
\ No newline at end of file
diff --git a/extra/formatting/formatting-docs.factor b/extra/formatting/formatting-docs.factor
index c249f1d6f3..4203dd891f 100644
--- a/extra/formatting/formatting-docs.factor
+++ b/extra/formatting/formatting-docs.factor
@@ -49,27 +49,27 @@ HELP: printf
 }
 { $examples 
     { $example
-        "USING: printf ;"
+        "USING: formatting ;"
         "123 \"%05d\" printf"
         "00123" }
     { $example
-        "USING: printf ;"
+        "USING: formatting ;"
         "HEX: ff \"%04X\" printf"
         "00FF" }
     { $example
-        "USING: printf ;"
+        "USING: formatting ;"
         "1.23456789 \"%.3f\" printf"
         "1.235" }
     { $example 
-        "USING: printf ;"
+        "USING: formatting ;"
         "1234567890 \"%.5e\" printf"
         "1.23457e+09" }
     { $example
-        "USING: printf ;"
+        "USING: formatting ;"
         "12 \"%'#4d\" printf"
         "##12" }
     { $example
-        "USING: printf ;"
+        "USING: formatting ;"
         "1234 \"%+d\" printf"
         "+1234" }
 } ;
@@ -109,6 +109,12 @@ HELP: strftime
         { "%Z"     "Time zone name (no characters if no time zone exists)." }
         { "%%"     "A literal '%' character." }
     } 
+} 
+{ $examples 
+    { $example
+        "USING: calendar formatting ;"
+        "now \"%c\" strftime"
+        "Mon Dec 15 14:40:43 2008" }
 } ;
 
 ARTICLE: "formatting" "Formatted printing"
diff --git a/extra/frame-buffer/frame-buffer.factor b/extra/frame-buffer/frame-buffer.factor
new file mode 100644
index 0000000000..708c0d8bd4
--- /dev/null
+++ b/extra/frame-buffer/frame-buffer.factor
@@ -0,0 +1,112 @@
+
+USING: accessors alien.c-types combinators grouping kernel
+       locals math math.geometry.rect math.vectors opengl.gl sequences
+       ui.gadgets ui.render ;
+
+IN: frame-buffer
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+TUPLE: <frame-buffer> < gadget pixels last-dim ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+GENERIC: update-frame-buffer ( <frame-buffer> -- )
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: init-frame-buffer-pixels ( frame-buffer -- )
+  dup
+    rect-dim product "uint[4]" <c-array>
+  >>pixels
+  drop ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: frame-buffer ( -- <frame-buffer> ) <frame-buffer> new-gadget ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+:: draw-pixels ( FRAME-BUFFER -- )
+
+  FRAME-BUFFER rect-dim first2
+  GL_RGBA
+  GL_UNSIGNED_INT
+  FRAME-BUFFER pixels>>
+  glDrawPixels ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+:: read-pixels ( FRAME-BUFFER -- )
+
+  0
+  0
+  FRAME-BUFFER rect-dim first2
+  GL_RGBA
+  GL_UNSIGNED_INT
+  FRAME-BUFFER pixels>>
+  glReadPixels ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+:: copy-row ( OLD NEW -- )
+  
+  [let | LEN [ OLD NEW min-length ] |
+
+    OLD LEN head-slice 0 NEW copy ] ;
+
+: copy-pixels ( old-pixels old-width new-pixels new-width -- )
+  [ 16 * <sliced-groups> ] 2bi@
+  [ copy-row ] 2each ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: update-last-dim ( frame-buffer -- ) dup rect-dim >>last-dim drop ;
+
+M:: <frame-buffer> layout* ( FRAME-BUFFER -- )
+
+  {
+    {
+      [ FRAME-BUFFER last-dim>> f = ]
+      [
+        FRAME-BUFFER init-frame-buffer-pixels
+
+        FRAME-BUFFER update-last-dim
+      ]
+    }
+    {
+      [ FRAME-BUFFER [ rect-dim ] [ last-dim>> ] bi = not ]
+      [
+        [let | OLD-PIXELS [ FRAME-BUFFER pixels>>         ]
+               OLD-WIDTH  [ FRAME-BUFFER last-dim>> first ] |
+
+          FRAME-BUFFER init-frame-buffer-pixels
+
+          FRAME-BUFFER update-last-dim
+
+          [let | NEW-PIXELS [ FRAME-BUFFER pixels>>         ]
+                 NEW-WIDTH  [ FRAME-BUFFER last-dim>> first ] |
+
+            OLD-PIXELS OLD-WIDTH NEW-PIXELS NEW-WIDTH copy-pixels ] ]
+      ]
+    }
+    { [ t ] [ ] }
+  }
+  cond ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+M:: <frame-buffer> draw-gadget* ( FRAME-BUFFER -- )
+
+  FRAME-BUFFER rect-dim { 0 1 } v* first2 glRasterPos2i
+
+  FRAME-BUFFER draw-pixels
+
+  FRAME-BUFFER update-frame-buffer
+
+  glFlush
+
+  FRAME-BUFFER read-pixels ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
diff --git a/extra/ui/gadgets/frame-buffer/frame-buffer.factor b/extra/ui/gadgets/frame-buffer/frame-buffer.factor
deleted file mode 100644
index 2d58037982..0000000000
--- a/extra/ui/gadgets/frame-buffer/frame-buffer.factor
+++ /dev/null
@@ -1,115 +0,0 @@
-
-USING: kernel alien.c-types combinators sequences splitting grouping
-       opengl.gl ui.gadgets ui.render
-       math math.vectors accessors math.geometry.rect ;
-
-IN: ui.gadgets.frame-buffer
-
-! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
-TUPLE: frame-buffer < gadget action pdim last-dim graft ungraft pixels ;
-
-! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
-: init-frame-buffer-pixels ( frame-buffer -- frame-buffer )
-  dup
-    rect-dim product "uint[4]" <c-array>
-  >>pixels ;
-
-! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
-: new-frame-buffer ( class -- gadget )
-  new-gadget
-    [ ]         >>action
-    { 100 100 } >>pdim
-    [ ]         >>graft
-    [ ]         >>ungraft ;
-
-: <frame-buffer> ( -- frame-buffer ) frame-buffer new-frame-buffer ;
-
-! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
-: draw-pixels ( fb -- fb )
-  dup >r
-  dup >r
-  rect-dim first2 GL_RGBA GL_UNSIGNED_INT r> pixels>> glDrawPixels
-  r> ;
-
-! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
-: read-pixels ( fb -- fb )
-  dup >r
-  dup >r
-      >r
-  0 0 r> rect-dim first2 GL_RGBA GL_UNSIGNED_INT r> pixels>> glReadPixels
-  r> ;
-
-! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
-M: frame-buffer pref-dim* pdim>> ;
-M: frame-buffer graft*    graft>>   call ;
-M: frame-buffer ungraft*  ungraft>> call ;
-
-! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
-: copy-row ( old new -- )
-  2dup min-length swap >r head-slice 0 r> copy ;
-
-! : copy-pixels ( old-pixels old-width new-pixels new-width -- )
-!   [ group ] 2bi@
-!   [ copy-row ] 2each ;
-
-! : copy-pixels ( old-pixels old-width new-pixels new-width -- )
-!   [ 16 * group ] 2bi@
-!   [ copy-row ] 2each ;
-
-: copy-pixels ( old-pixels old-width new-pixels new-width -- )
-  [ 16 * <sliced-groups> ] 2bi@
-  [ copy-row ] 2each ;
-
-! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
-M: frame-buffer layout* ( fb -- )
-   {
-     {
-       [ dup last-dim>> f = ]
-       [
-         init-frame-buffer-pixels
-         dup
-           rect-dim >>last-dim
-         drop
-       ]
-     }
-     {
-       [ dup [ rect-dim ] [ last-dim>> ] bi = not ]
-       [
-         dup [ pixels>> ] [ last-dim>> first ] bi
-
-         rot init-frame-buffer-pixels
-         dup rect-dim >>last-dim
-
-         [ pixels>> ] [ rect-dim first ] bi
-
-         copy-pixels
-       ]
-     }
-     { [ t ] [ drop ] }
-   }
-   cond ;
-   
-! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
-M: frame-buffer draw-gadget* ( fb -- )
-
-   dup rect-dim { 0 1 } v* first2 glRasterPos2i
-
-   draw-pixels
-
-   dup action>> call
-
-   glFlush
-
-   read-pixels
-
-   drop ;
-
diff --git a/extra/webapps/irc-log/irc-log.factor b/extra/webapps/irc-log/irc-log.factor
index c193550719..bd9843bdc9 100644
--- a/extra/webapps/irc-log/irc-log.factor
+++ b/extra/webapps/irc-log/irc-log.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: calendar kernel http.server.dispatchers prettyprint
-sequences printf furnace.actions html.forms accessors
+sequences formatting furnace.actions html.forms accessors
 furnace.redirection ;
 IN: webapps.irc-log