A matter of legality...
To quote what an old kung foo instructor once told me.. If you knock the person who's attacked you to the ground and them kick 'em afterwards that's illegal and they can sue. But if when questioned later you say that you were confused because "it all happened so fast" and "you accidentally run away *over* them" then that's ok. :-)
(OrangeMochaFrappuccino last watched Dexter on, Sun 17 May 2009, 20:12, 2 replies)

Ahem,
*cough* of course from your story it sounds like the bully started an unfortunate chain of random events that resulted in some terrible misfortune on his part. The similarity or apparent occurance in the story of an accidental unleashing of ninja skillz is obviously purely coincidental. ;-)
(OrangeMochaFrappuccino last watched Dexter on, Sun 17 May 2009, 20:29, closed)

Yes, and as that's exactly what happened in this instance then we have a sound precedent
which can be quoted in context, viz. 'I read on a website that...'
(Juan Quar is clinging to her front teeth on, Sun 17 May 2009, 22:22, closed)