My son also seems to share my abnormal reaction to pain... beyond a fairly tolerable threshold, I go numb. I know I've injured myself somewhat seriously if I feel quickly rising pain followed by numbness. When my tooth got knocked loose, it went numb. The three times I've sprained ankles (once in the woods, 3 days form the nearest hill with cell phone coverage), my ankles have gone numb. The time the cartilage in my nose tore from the bone, it also went numb. Ditto for the time I burned my finger while arc welding (though, I think that time I killed the dentrite back to my spine and it had to grow back out). My son takes a tough fall and other parents look at me like they expect my son is going to cry, and my son just gets up and keeps playing. So, I don't think his nightmare were about pain, either.