Ever hurt yourself stupidly?

Either my mind is blocking recent stuff out, or the only funny things that spring to mind for me are from a few years ago.

I helped a friend move some junk on a weekend from their garden and stupidly thought I could break a worn soggy bit of chipboard in half by headbutting it, yay for entire weekend long headaches!

The other time involved a beach, a bunch of friends and an inflatable raft, but the only person who actually got hurt was me! It happened when I was the only one in the boat, within minutes of people getting out to get food so it was just me and one other guy left.

He got out the boat as I attempted to row it closer to land, then the waves promptly capsized the boat, tangled my right foot in the handle ropes and dragged me sideways with the currents about 50 metres before we managed to regain control of it. For some reason I laughed during the whole thing, but I can't think for the life of me why now

This 3rd thing had nothing to do with me, but as a witness it's too stupid for me not to share, I was giving a bunch of new people a tour of the college I was studying in. Meanwhile behind me as I talked to the group, about a football pitch length away on the 3rd floor of some spiral stairs...

"I've jumped down from these stairs before!"

"haha yeah right"

"don't believe me? I'LL DO IT AGAIN THEN!"

He then promptly leapt from the stairs to the ground, scaring the crap out of everyone which made me turn around wondering wtf was going on. We couldn't get near him due to the crowd, apparently after he fell he said "I don't want to die" and I'm willing to wager he did those legs some serious damage.

Jam it back in, in the dark.