When I was nine, I fractured my leg. My Dad picked me up from school (was pushed off the climbing frame by my "friend"), took me straight to the hospital, got a cast, went back to school to tell the headteacher I won't be coming to school for a bit. They also gave me crutches, it was pretty hard to walk with them, so I mostly sat down and watched TV. After a week or so, I went to the hospital for a x-ray and they were going to give me this sort of really big boot (kinda like a cast) and I had to go to school wearing that. During playtimes, one of my real friends volunteered to stay with me and just play games and stuff.
I had to get physiotherapy for a while, mainly just walking exercises. My leg healed a bit, and I didn't have to wear the big bot my friends proclaimed "toilet shoe". Also, I once nearly went blind when I was six. We were playing hockey for PE, and one of the kids hit my eye. I couldn't see from my left eye for a day, I had to wear an eyepath as well.