This week starts the Swedish surströmming festival. Surströmming is "sour herring". By sour they mean fermented in reality its rotted. It goes in a tin, slightly larger than a tuna fish tin the year before. The next year it has rotted and fermented to the shape of a handboll. One week a year Swedes eat this delicacy (beware of any food only eaten once a year, there is a reason it is not eaten more often).
It is never served in a restaurant. Why you ask? The stench. The smell is so bad it is always eaten outdoors by anyone with a nose. The tin itself must be opened under water, using a large pail. Otherwise the liquid contents, which are under high pressure, would squirt out making anything they touch unusable for all time. A Swedish women who moved Munich used to have this in her apartment once a year. She was on the 2nd floor of a multifloor complex. The stench would spread thru the building. After a few years the landlord evicted her. She took the eviction to court and lost. The smell, even if only once a year, was considered reasonable cause for eviction! And people eat this stuff. Talk about your last days on earth!
And guess what, Iceland is worse. In Iceland they do this with shark which the bury in the sand for a year then dig up and eat the rotten flesh. It is supposed to have a perculiar odor and texture. Yeah, I bet. Good for them they are in the middle of the Atlantic so the stench cannot carry to another country. Otherwise they would have been bombed to smithereens years ago!
Avoid Sweden for the next few days.