At a previous job, I had a boss that nobody liked. SHOCKER, I know! He was a really cheap old guy, and it wasn't a very good place to work, but sometimes you gotta do what you gotta do, right?
Anyway, my boss would go for a run every day. He would leave at noon every day, run a set route, and be back at 1:00. It was like clockwork. When he would get back, he would immediately take a shower. (one of the bathrooms in the office had a shower stall)
So, to extract some measure of revenge on this guy that we hated so much, one of my co-workers (let's call him Calvin) would go into the bathroom with the shower every day at 12:50, and umm "drop the duece" so to speak. No kidding! He did it every day. He used to plan for it! Let's just say he ate lunch at Taco Bell, a lot.
Then we used to watch from afar as the boss waited outside the door, sweating, while Calvin finsihed the deed. Making him wait was funny enough, but then when Calvin came out, there would be this weird, uncomfortable exchange where they would both just nod at each other. No words were exchanged, but each one knew exactly what the other was thinking. This went on for months. We used to drop everything to watch this little soap opera unfold every day.
It used to slay me, knowing that the boss had to walk into a wall of stink every time he wanted to take a shower, and yet he never did anything about it because that would be admitting that Calvin had won. I still laugh about it.