XPost: alt.home.repair, alt.sci.physics, uk.d-i-y   
   From: CFKinsey@military.org.jp   
      
   I tried one, once, I couldn't stay on it.  I see countless Youtube videos of   
   people falling off them.  But why?  If you are about to fall over backwards,   
   shouldn't it feel the tilt of your feet and simply roll under your centre of   
   gravity?  It should be    
   impossible to fall off.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)