The front teeth dont hurt too much. But I once got bitten by the back teeth. This kid was holding onto a steer at a show, waiting to go in the showmanship classes. He said to me 'Hey, why's he doing that funny thing with his mouth?' - the bl00dy thing had been choking for the last ten minutes and the kid had no idea. And I mean really choking - eyes bulging and everything. I had my arm down his throat (the steer's, not the kid's) and found a bit of straw lodged in there, but he bit down on my finger with the back teeth, and I kid you not, I lost the tip of my finger. He bit off the tip including the top of my fingernail, and cut right down to the bone a little bit further up on my finger as well. Oh my God that hurt! The first aid ambulance guys just about pissed themselves when I turned up and said I was bitten by a steer.