I've broken bones up and down my pinky on my right hand from hitting stuff/people. For some reason, when I swing, I don't swing very straight, and end up hitting with that side of my hand.
And holy crap I just noticed that "when I swing, I don't swing very straight" sounds really, really gay.
How strange - I've just been reading a thread from 2002 in which tacoX complained about being grounded after punching a wall because his Mum was yelling at him, which ended with people discussing how they can't punch through their walls, and the composition of walls. Breaking knuckles from punching walls popped up briefly.