That is a good one. I think it was this thread where I related I was handling the gas pumps by myself as well as doing an oil change on a car in the bay. To make a short story sad, I didn't tighten the drain plug except finger tight. I called a friend to handle the pump while I followed the oil trail. It ended at a driveway (a kid I went to high school with). He said it was getting very noisy, but I'm sure I'd remember if he had seized a rod or worse.
In the 70's I was doing a complete remodel of a house. Only had a 1/2 ton pickup with leaf / shock absorbers on rear. I had so many loads of plaster & lath to take to the dump that I routinely severely over-loaded it to cut the number of trips to the dump. I had a three inch pipe I filled with concrete that I hung under the front end so I had some steering. I broke the leaf springs on both sides. I'd like to give a rough calculation on how much weight I was carrying, but just don't know. Probably three times maximum safe load. I didn't save much money; took a lot of time to put in new leaf springs, plus the time I lost on the job.