I've had cuts I didn't know about, but the worst was when I worked retail and managed to smash my upper arm on a shelf, and apparently I was bleeding bad enough to leave a broken trail from the front of the store to the break room.

I couldn't feel anything but the aching of the blunt force trauma, I didn't feel the sharp cut or any stinging at all.

I've also had plenty of small spots I have no idea how they happened, but usually I'M the one to figure it out...