You know that iPhone game Fruit Ninja? Where fruits are flying at you and you have to slice them in half with a finger? It's a good, mildly challenging subway diversion. Translate it to the real world, though, and suddenly the air is full of slashing blades and squirting pulp, and it's not nearly as easy to cut a fruit in half as you thought it was.
I found this out the hard way. And wasn't I lucky that our Phantom v641 high-speed, high-def video camera was there to document my shame at 1,200 FPS?