My pain treshold is, I dunno, varying? I've cut a knife all the way to the bone of my index finger once (by accident!), but it was pretty tolerable. I don't seem to have a lot of tolerance against those martial arts joint locks though, I think i'm at about the same level as most people there. As for blunt strikes, I can take a fair amount of those. It's not that I don't feel the pain, it's that I'm too stubborn to let it stop me.

I once fell and got a pretty large cut at the top of my head, but didn't fracture the skull. I was about 6-7 years old but I didn't actually feel any pain worth mentioning. It was like having a minor headache, so I was pretty surprised when my parents started panicking and stuff when I came in with my face covered in blood. I didn't understand why they were so worried. I guess maybe there was a lot of those natural painkillers flowing around in my body at the time, that could explain it.