When I was about 8 or 9, a friend of mine dropped a small boulder on my hand.
My right middle finger now has a line of scars going straight down the middle, as it literally split my finger into two large halves.
Even worse, it was on a camping trip, so the only medical treatment I got was a pat on the back.
By the time I reached a hospital, a day later, I was so tired from the pain that I slept through the entire operation of scrubbing the gravel and dirt out of my finger with a wire brush without any painkillers.
I have also broken my wrist before and ignored it for three weeks, still going to school and participating in physical education and such. I only went to the doctor after it made a snapping noise one day while I was lifting weights to discover that I would need surgery if I broke it any further.