Remember wrist rockets? They were hand catapults braced against the wrist for better leverage. Anyway, there is now a company that sells wristwatches with tiny catapults that fire tiny copper beads. Playing with one of these in a company meeting room would probably get you fired and sued for injuries.
I must admit, when I was younger, I entertained the urge to learn pratfalls and mock combat. Ever since I saw that DEVO video where the guy flips, back first, head over heals onto his back, I wanted to be that graceful. All those early breakdancing vids drove my ambition too. Of course I never did learn the art of pratfall but I did, years later, find a page with detailed instructions on how to fall down stairs without hurting yourself seriously.