I took a bat to the face when I was 8. Raccoon eyes for a week, broke my nose and chipped/cracked/whatever the ridge around my eye. Still get random nose bleeds.
Kicked in the balls in Tae Kwon Do. Just before I went down I gave the guy a shot to the face. I was fine 30 minutes later, he had a black eye for over a week. We didn't spar again.
Impacted wisdom teeth sent me to the ER not able to recall my name when asked, rocking like a crack addict from the pain. They gave me the strongest narcotic they had (perkadan? perkaset? I dunno), it didn't do shit. Next day had all 4 of them extracted. Made it to my algebra midterm 2 days later, still spitting mouthfuls of blood, hopped up on Viccodin. 95% what now?!
Shattered my collar bone mountain biking. Walked 300-400 rocky/treacherous yards to the car holding my arm up, 10 miles to the hospital, ExGF drove me. They tried the sling. Didn't heal. They tried the figure-8 brace, didn't heal. They tried Electro-magnetic stimulation with a bone growth magic tool, didn’t heal. After 6 months of having a floppy ass arm (where any movement was painful, and sleeping was nearly impossible) they finally put 7 pins and a plate in. The dry heaves from the morphine were the worst_pain_ever. The pins are like little needles, and the plate is like a razor blade, any pressure on the collar bone is painful, and certain ranges of motion are impossible.
Here are the x-rays before/after.
3 root canals. I've got a Tachycardia and burn off the epinephrine faster than normal requiring more shots...Well, there's a limit to how many they can give you in one sitting. I reached that limit one day while they were drilling through the nerve, some 30 minutes later the drilling stopped. I had to sit still, and hold my mouth open. All I could see was white (not the lights), all I could hear was ringing (not the drill). Good times.
The worst, however, was testicular torsion and surgery to fix it. Basically, your testicles have cords that go down to them, if they get kinked/twisted the testicle starts to die, and while doing so it sends off a warning signal to your central nervous system saying "SOMETHING IS VERY WRONG" which translates to the worst pain that you can possibly imagine. Like getting kicked in the groin, by a very angry mule, on steroids, 100x a second, for an hour. I had a good GF at the time who took the opportunity to cheat on me, and dump me because I wasn't any fun with an ice pack on my balls and enough viccodin in my system to kill a horse.
Pain tolerance? Yeah, I've got that.