Ho ho ho ho hoooo boy, with my level of stupidity this should be fun.
When I was 7, I was introduced to Kit-Kats (I had been allergic to chocolate since birth and had finally had my first candy bar) I became basically an addict to them. Eventually my mother hid them from me so I wouldn't turn into a fatty fat. Being intelligent me, I immediately knew where they were. The highest point in the pantry! I climbed on to the cat food bucket (not tray, we have this giant bucket that originally had cheese balls in it that we now put cat food in) to reach them. Just as I reached them the bucket tipped and I ended up getting my finger nail caught on the edge of the shelf and it tore the entire thing off. I also landed on my head. Blood squirting out of my thumb and a splitting headache.
ALL I WANTED WAS SOME KIT-KATS
Oh I also have another story!
When I was 10, I was running in the house playing with my cat. You know how your ankle folds sometimes when you trip or have a muscle spasm? That happened and I landed on my elbow. Wasn't very pleasant. I had an ankle that was twisted, sprained, and cracked all at the same time. (According to my doctor, hell maybe he was drunk or something) My elbow was somehow fine. That doesn't make up for the fact that when I fell on it, it was my funny bone. Holy crap-baskets.
My lack of common sense also tends to get me injured.