Well, that would be one of two things:
1) When I was younger, I went to German school in the US. The tables had iron bars between the legs, and the chairs were attached to them. One day, I was bending down to get something I'd dropped, and hit the bar with my mouth. I held out my hand in surprise and felt two small objects drop into it - my front teeth
. I still have two plastic front teeth.
2) Getting my wisdom tooth pulled a month or so ago. That was pure agony, especially as the painkiller started wearing off halfway through. The wound got infected, I couldn't go to school for 4 days... I couldn't even eat. In three days, I ate far less than half of what I would eat on a normal day. Sheer torture