I was once haunted by an older man who was constantly exposing himself in the bathroom outside my office. I worked at a college, so it was odd to be flashed by anyone over 25—especially during the day. But this man was consistently at the urinal, facing outward, and shocked that someone else (I) would come in while he was doing whatever he was doing.
No one could ever tell me who he was, and it remains a mystery to this day.
Oh, and I had a client threaten to shoot me with an arrow. Still don’t get that one.