when i was about 8 i crashed an ATV when i was driving it with my dad. we hit a pot hole in this gravel road out in the country and i jerked the handle bars to try to recover and we ended up rolling into a ditch and getting cut up pretty badly (we were wearing shorts and tshirts). it could have been way worse, though, because the thing rolled right over my head. luckily, i was wearing a helmet.
i also had a pretty bad spill back when i used to race, at around age 13-14. i clipped a gate and tumbled hard, straining my LCLs in both knees. i couldn't walk for a week, and had some really bad pain for like 2-3. that was more scary than anything, though. i thought for sure i'd need surgery and the feeling of not being able to walk or bend your knees with any load on them really rattles a kid.
when i was a baby i fell into a rose bush. parents still tell stories about that. i fell off the front porch as a toddler wearing nothing but a diaper and had hundreds of needles sticking out of my skin like i just tried to fuck a cactus. funny shit.