When you walk into the bathroom to take a poop and someone that you don't want to see you poop is going pee. So instead of going into the stall, you pretend to pee next to them and make small talk until they leave, then you rush in the stall and tend to your poomergency.
Guy 1: What took you so long?
Guy 2: I busted a crazy poop juke on my boss and almost shit my pants in the process.
Guy 1: Well done, Emmitt Smith