I use to do a lot of residential track homes with basements and partial crawl spaces. Local code required EMT conduit. Way too many times I would be stuck roughing the crawl space, crawling along in the semi dark and either my hand, knee or conduit bender head would find a big pile of S*** from one of the previous trades.
Also, where we're at, we have sump pump pits in the basement. Everyone of the trades seem to use them to take a leak in. One day I was roughing the basement and inadvertently placed a leg of my ladder on the pit cover. When I climbed up the ladder, the weight caused the cover to give and one of my legs fell all the way into the sump pit, which was filled with piss that went above my knee. Do you think my foreman would take pity on me and let me go change? Heck no. I squished around in a piss soaked boot all day.