Ever hurt yourself stupidly?

I can think of 2 incidents...

The first one was with a disposable razor. The razor was getting dirty so I tried to getting it out my tapping the razor on the sink. It didn't work so I used......my finger. That was when I realized that the razor will not cut you if you clean it with a up and down motion. Needless to say.... I tried to clean it with a left and right motion. I got two deep cuts on my finger for that stupidity.

The second incident was on a computer chair. (Oh yes they are dangerous). Almost all computer chairs can be adjusted by pushing a lever underneath the seat. Usually the pole that connects the seat to the wheels have this sort of extending plastic tubes (one tube inside the other). When I was younger, I was a curious little bugger (aren't most of us). I had the chair at maximum height, I put my feet around those extended plastic tubes and lowered the seat. The skin on the top of my foot got caught in the tubes. I couldn't pull it out so I couldn't stand up to raise the seat. My brother pulled my foot out. It took weeks before the huge black and red circle disappeared from my foot.

Jam it back in, in the dark.