I suppose the title is bespoken for :). Last week I had just finished and was going to wash my hands. At that moment the stall adjacent to the faucets opened and a woman was coming towards the sink. We each made contact with a puzzle expression. Internally, I freaked thinking I accidentally went to the women's restroom when another guy came through.
Horrified, she quietly exited, leaving both myself and the guy with the same confused expression. Certainly nothing of egregious proportion, though interesting nonetheless. Would love to see if anyone else has bizarre stories to tell of.