At a former company I worked for they decided to build an outdoor basketball court on site. We had a regular group of guys that would play at lunch at the local req league and when we got the news that we would no longer have to travel off site (more time to play) we were thrilled.
So naturally there were some guys that decided they would come out and play who were not part of the normal crew, who had never played with us before.
The head of the IT department (some overweight 6'1, 320-330 lb guy without an athletic bone in his body) decides he's going to play. He pulls his hamstring on the very first play, and was then out of work for 2 weeks.