I used to work at a place with a guy whose wife didn't let him use the bathroom at home before work, with good reason. About 15 minutes after he got in and sucked down a cup of coffee, he tuck his newspaper under his arm, and stride proudly and purposefully toward the bathroom, like someone walking to a stage to receive a medal. He'd stink up the joint for half an hour. It was like someone cleaned out a chicken coop, poured toxic sludge on it, then let it sit in the heat.
The one-seat bathroom was centrally located in a small office, not out in the hall. I sat fairly close to it and could see him start 'the walk.' I'd jump in ahead of him and hang out for 5-10 minutes and let him wait a while. By the time he started the walk, he was already at critical mass. My coworkers used to love watching him squirm.