Let's see... there have been several.... To name a few, I commando-rolled into a wall while playing secret agent with an old college buddy. (several years ago)
I tried hooking my watch up to a small generator and turning it up all the way...with the watch still on my wrist. Thought I'd see what would happen to the watch without thinking that the alligator clip was also touching my very conductive skin as well. 🙄 🙄 (again, several years ago)
The most painful thing I've done recently, though, is skiing down a mountain faster than I knew I should go (thinking I was invincible or something), catching an edge on my outside ski mid-turn and tearing my ACL in the process my body still turning, but my leg not. The actual tear wasn't so bad, but the recovery after surgery was a beast! (about three years ago)
My short term memory is going now so I don't remember any of the more recent ones. 😀