I had 2 wisdom teeth removed from my lower jaw. Not a nice prank really. The left one went fine but the right one well... didn't. It hadn't fully exposed itself yet, so the surgeon had to make a cut. After he did that, he failed at removing the teeth and when he squeezed a bit too hard my tooth splitted in two large and some smaller fragments which he then had to remove by making an even deeper cut, one by one, while I was lying there thinking 'wtf' and half bleeding to death.
Ok, it wasn't that bad, but the fact that my tooth splitted in two was a fact, as well as the unnatural-feeling crater I have in my mouth.