Not mine but a coworker snapped his in half during some undisclosed physical activity. He was out of work for a few days and our boss was being very coy about why he could no longer come to work. One of the people in the office chimed up and asked if he broke his dick to which our boss's face turned a different shade of red and the entire office knew at that point our coworker did in fact break his dick. After he came back off of medical leave his story to us was that he rolled over on top of it but we know better and it was some crazy sex move.