XPost: alt.home.repair, alt.sci.physics, uk.d-i-y   
   From: CFKinsey@military.org.jp   
      
   On Thu, 24 Jan 2019 20:43:14 -0000, Steven  wrote:   
      
   >   
   >   
   > "Commander Kinsey"  wrote in message   
   > news:op.zv40t1vfwdg98l@desktop-ga2mpl8.lan...   
   >   
   >> 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?   
   >   
   > Not possible with your feet still on it.   
      
   What isn't possible?  It moving under you or you falling off it?   
      
   >> It should be impossible to fall off.   
   >   
      
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