I used to pick on a supervisor I had a few years ago when he broke his first bone at the age of 32. I felt like a person couldn't have had all that much fun as a kid if they didn't experience at least one broken bone. I myself have had six confirmed by a doctor. LOL
I was around 40 when I broke my first bone (skiing).
One thing that strikes me about my childhood is that although I avoided injury myself, I hung out with out kids who did get injured and did the same kind of stuff. For example, I played with home-made fireworks, and with steam-engines fuelled with meths. My friend gave himself serious burns playing with meths. I like to think I am smarter than him, but I don't know if I was just lucky. (I wasn't present and didn't contribute to his accident. It was apparently made worse by his panic reaction.)