Truthfully, a lot of plumbers never see that type of stuff. New construction and other industries. Although, those willing to deal with it had an hourly rate that makes many programmers envious.

Although, as a programmer, I had to remove a dead rat from a track (rail) after the cart (electrified, motor model size) carrying medical samples hit it. It was quite the shock climbing the ladder, opening the false ceiling, and then doing the horror-movie-style 180 with the flashlight.