diff --git a/.todo b/.todo
index c3e5df9..98cc554 100644
--- a/.todo
+++ b/.todo
@@ -1,2 +1 @@
-- rapid prototyping demo
 - support reference objects
diff --git a/Engine.cc b/Engine.cc
index bbc19b2..806edfe 100644
--- a/Engine.cc
+++ b/Engine.cc
@@ -1414,6 +1414,7 @@ void Engine::Object::draw()
         {
             glPushAttrib(GL_TRANSFORM_BIT);
             glEnable(GL_NORMALIZE);
+            glPushMatrix();
             glScalef(m_scale, m_scale, m_scale);
         }
 
@@ -1422,7 +1423,10 @@ void Engine::Object::draw()
         checkGLError();
 
         if (m_is_scaled)
+        {
+            glPopMatrix();
             glPopAttrib();
+        }
 
         if (transform)
             glPopMatrix();
diff --git a/lib/demo/checkers.lua b/lib/demo/checkers.lua
index 6bac0d0..f9a3e06 100644
--- a/lib/demo/checkers.lua
+++ b/lib/demo/checkers.lua
@@ -13,3 +13,9 @@ function init_event()
     checker = ag.loadTexture("checker.jpg")
     createWorld()
 end
+
+function reinit_event()
+    ball = ag.createSphere(0.5)
+    ball:setColor(1, 1, 0)
+    ball:setPosition(3, 3, 4)
+end
diff --git a/tests/bowling.lua b/tests/bowling.lua
index 7cd2726..dda6cf0 100644
--- a/tests/bowling.lua
+++ b/tests/bowling.lua
@@ -1,5 +1,7 @@
 
 function init_event()
+    ag.import("std")
+
     local rows = 5
     local offset = 1
     local pin = ag.loadModel("bowling_pin", 0.5)
@@ -22,13 +24,9 @@ function init_event()
     ball = ag.loadModel("checkerball", 0.5)
     ball:setPosition(2*camx - cx, 2*camy - cy, 2*camz - cz)
     ball:setMass(5)
-    --ball = ag.createSphere(0.4)
-    --ball:setColor(0.2, 0.2, 0.9)
 
---    local crate = ag.loadModel("crate")
---    crate:setPosition(0, 20, 10)
-
---    crate_texture = ag.loadTexture("crate.png")
+    smallPin = std.loadModelBounds("bowling_pin", 0, 0, 1)
+    smallPin:setPosition(0, -1, 1)
 end
 
 function mousebutton_down_event(button)