waffle

This one is weird.

Fan death is an urban legend that was originally primarily confined to South Korea, but has spread to other countries in the Far East. The legend states that an electric fan, if left running overnight in a closed room, can result in the death (by suffocation, poisoning, or hypothermia) of those inside. This belief also extends to air conditioners and the fans in cars. When the air conditioner or fan is on in a car, Koreans are apt to leave their car windows open a crack to avoid “fan death”.

The legend is remarkably resilient, and is accepted even by many Korean medical professionals. In summer, mainstream Korean news sources regularly report on cases of fan death, even if more likely causes (e.g. heart attack, gunshot, alcohol poisoning) are evident. [..] When informed that the phenomenon is virtually unheard of outside of their country, some Koreans have gone as far as suggesting that their unique physiology renders them susceptible to fan death.