Dislocated my shoulder.
Wasn't exactly sure what had happened at the time, so I just waited a good hour to see if it would get any better. As it turned out, it got worse, so I went to the hospital. Checked myself in. Conversation went kinda like this (emoticons for emotional inflection):
(Protagonist enters the hospital Emergency Room, one shoulder 3 inches lower than the other, but otherwise appearing fairly cheerful)
Nurse: "Can I help you?"
Me: "Yes, I'm pretty sure I've dislocated my right shoulder. ^^"
Nurse: "... Do you... need to sit down?"
Me: "Nah, I'm okay. But I'm right handed, and that's the dislocated shoulder, so if it would be alright will you fill in my information sheet for me? ^^"
Nurse: "Oooookay.... I'm gonna get you a doctor..."
Doctor is there within a couple minutes, insists I sit down while he examines my shoulder. I continue the check-in process while he manipulates the joint. Needless to say, this is extremely painful, but meh. Pain is temporary. Friend who drove me to the hospital (couldn't work the gearshift properly without my right arm) shows up at this point, after having parked the car, I point him out to the nurse. Doctor decides my shoulder is definitely dislocated, sends me to X-ray. X-ray techs proceed to bang my shoulder around in their machines of torture for a while, wincing more than me through most of it.
Nurse: "Are you okay?"
Me: "I'm good, heh."
Nurse: "I just wanted to say you're handling this extremely well. Most people are screaming in pain when we do this."
Me: (one-shouldered shrug)
To wrap the rest of it up rather quickly, it took THREE HOURS for the doctor(s) to put my shoulder back in. They tried a variety of methods, but the muscles were spasmed so badly around the joint that the first doc simply couldn't exert the necessary force on my shoulder while manipulating the joint (it ultimately took both of his hands) to line things up properly. The two-doctor attempts were their final fallback position before they knocked me out with general anesthesia because they were of the opinion that I was going through too much pain. The one that actually worked had me lying face down on a gurney while one doc pulled with both hands on my arm from below while the other worked the joint, since he hadn't been able to manage it while we were all vertical.
I spent most of those three hours joking with the doctor(s), nurses, and med students who were brought in to observe the, as they put it, "classic dislocation".
So yeah.
My pain tolerance is pretty extreme.