Have only been to A&E twice, once for falling off roller skates and cracking (but not breaking, it turned out) my elbow, and more recently for ectopic heartbeats, which turn out to be nothing to worry about. So not especially stupid.
However, I did put a spoke right through my middle finger and out of the other side after cutting the hub from an old wheel and then deciding to pull the computer magnet off one of the cut spokes. As it came free, my hand was impaled on the opposite cut spokes. Sharp jab, pulled my hand free (some resistance!) and found the entry and exit wounds. I showed the neighbour, who was a nurse, and we decided that, as everything still seemed to work and my tetanus jabs were up to date, there was probably no need to do anything. I took a photo, though.