My "when I was about 5 years old" story is that I got a blade of a pair of "safety" children's craft scissors across a plug that was plugged into an extension cord. I don't actually remember the event, but I remember my parents rushing into my room, greatly concerned (I think I must have blown a fuse), and I remember the black hole in the edge of my scissors forever after that.
I don't recall being injured, or even being aware that anything significant had happened.
I note that tamper-resistant receptacles would have made absolutely no difference.
