I’m surprised how often, when I walk into a bathroom in a work environment, that there is someone in a stall and talking on their cell phone. At least I hope they are talking on their cell phone. Then I begin to worry that they are talking to themselves. It then becomes a mad rush to finish and leave before they leave the stall. If they were on their cellphone, they would hopefully finish the conversation before leaving. But then when they do leave the stall it looks like they were talking to themselves. Therefore I usually assume that they are crazy.
Moral of the story is don’t talk on your phone in a bathroom, and if you find someone doing this leave immediately because they are crazy. Also, don’t talk to me while your taking a shit.