When I was a young kid, maybe 6 or 7, I was riding my bike when I decided to see if I could fit my foot in between the spokes of my front wheel while coasting along.[footnote]Yes, yes I could.[/footnote] Got banged up when the bike flipped and twisted my ankle up a bit, but nothing permanent other than an interest in physics.
Older, while at home while heavily inebriated with a bunch of friends. Decided to jump over a couch to tackle one of said friends. Running at the coach from the back, I planted one foot on the back of the couch, jumped forward and up, and managed to headbutt the blades of the ceiling fan. Broke the ceiling fan, and had a bit of a bump, but otherwise OK.
Older, while at home while heavily inebriated with a bunch of friends. Decided to jump over a couch to tackle one of said friends. Running at the coach from the back, I planted one foot on the back of the couch, jumped forward and up, and managed to headbutt the blades of the ceiling fan. Broke the ceiling fan, and had a bit of a bump, but otherwise OK.