Mine came out when I was 23. Had a tootache--turned out to be an abcessed wisdom tooth, and one of the others was impacted.
So I go in--it's local anesthetic (novocaine). 8 shots. I thought the one into the abcessed tooth would hurt the most (and said so after that shot), but the dentist said, "No, the one in the roof of your mouth will be worse." He was right. 5 of the shots "didn't take" and I got them again. So, 13 shots of novocaine later, I'm ready to go.
The dentist is drilling into one of the teeth, and then using a blunt-edged instrument to pry it out. Drill, pry. Drill, pry. Drill, pry--snap! My tooth broke the stainless steel instrument.

I had stitches in two places, but no major issues or problems. Just my steel-breaking teeth.
The night before my appointment, I had been up all night typing my Master's thesis. Then I moved all my stuff into storge, went to the dentist, ran errands around town (post office, returning my office keys, etc.), went out with friends, and then next morning took a plane ride home. The happy pills helped, but I stopped taking them after two days because it was just getting too easy to pop those pills.
So, if the one hadn't been abcessed, I would never have gotten them out (at least at that time). Since I had to get the two bottom ones out (the abcessed one and the impacted one), the dentist said we should get all 4 at once.
I still laugh about the whole experience (the extra novocaine shots, breaking the instrument), but at the time it was a little un-nerving. Probably because it was my first "medical incident" as an adult. I got sticker shock when I saw how much I had to pay for the prescriptions involved, and before the extraction I had to sign a waiver which listed all sorts of gruesome possibilities (up to death) which I would not hold the dentist reponsible for if they happened as a result of the procedure.