Many moons ago, doing a woman from behind while a bit toasted. Penis slipped out and hit her full stroke in the butt cheek. Ouch, then a bit of dull pain, then back to work. A few days later after an uncomfortable feeling in the groin area I went to the doctor. One hernia operation later things got a bit better. I know there's a moral somewhere in this true story, I'll try and think what it is heh.
Mr. OMG