I was like 9 or 10 when i lost all the skin of my left hands ring finger. I was sitting in my grandmothers deck chair (or whatever its called in english, the one where you pull the armrests up and the back lowers). Anyways i was getting up from it and somehow my finger got stuck between the armsrest. Didn't notice it in time, so when i stood up the skin from my finger was gone, right down to the "red meat".
It hurt like a bitch, but only took a few weeks to heal.