What was the most ridiculous previous remuddling that you had to fix in your old house?

Ours was a natural gas dryer that some previous 'handyman' (probably the Two Drunk Uncles Destruction Co) had vented by extending the vent 2 feet out the top, then curving it back down behind the tank toward the floor, where they just jammed the duct through a hole cut in the floor and into the crawl space below.