In South Korea, people believe that electric fans can kill. Yes, it is strange that some of the world's smartest people believe in something we Americans don't even think twice about. However, stranger things have happened and are believed in everyday.
Many in South Korea think that you will die in your sleep if an electronic fan is in you room at night, but only if the doors and windows are closed. For this reason, fans sold in South Korea have timers built in so they will shut off after a while.