Worst thing that ever happened to me, which really I could call the best because it's funny as fuck was during a visit to my girlfriends place when she was at university. It was the end of the day and I was just tired as hell and she was wide awake and wanted to go at it. So I suggested she should just ride me for a bit then maybe I'd be able to get into the mood to get going. So she is on top of me and everything just going at it and I was so fuckin' tired I just fell asleep. Thing is, she had no clue because the lights were off and didn't find out until I started snoring. I thought it was rad.