My left hand has been shut in a car's front door, and a van's sliding door. Gotta love my parents closing the door before I get out of the car/van. I have next to no feeling in my left hand.
I also got my arm caught in a revolving door. We were visiting a hospital, and my brothers were being stupid and ran into the revolving door, just as it was about to close. I thought I would do the same, and got my arm caught, and pulled through the door by my arm. I still got the mark from that.
And when my Dad was cooking something on the stove, he told me "Don't touch it, it's hot" after he had turned it off, and he walked away. (Hint: Don't tell small kids NOT to do something, and walk away), I then put my hand on each burner one by one, until I burnt my hand pretty badly.
EDIT: Glad I'm not the only one whose done this. Though the heating element on the stove wasn't glowing red when I put my hand on it.
Note: I was only about 6 or so years old when these happened, since I remember my dad being there for all of them, and my parents divorced when I was 8 or 9