When you're taking a dump in a stall, and another
guy takes a dump right in the stall
next to you. There are three (3) stalls, but he chooses that one.
Not only that, but he waits until you're done with your
business before he leaves. Because nobody wants to show their faces after a dump. That would be office suicide.
So anyway, you're rushed, because you need to finish, and also - you're nervous when you're washing your hands, that he'll come out, and you'll know who the Dump Creeper was.
But in any
case, he'll ruin your entire dump experience, you can be sure of that.