Fermented foods really make you wonder how crazy and/or desperate the ancients were. You have to do a lot of things wrong along the lines of storing surplus grain to even come up with something as tame as beer.

Greenland has its own fermented cartilaginous fish, Hakarl. At least twice in culinary history, someone decided that letting a shark or skate sit somewhere long enough to get WEIRD and start reeking of piss so badly that it hurts wasn't such a bad idea and eating it might be okay. Crazy.