Trivia Question: In 1518, citizens of Strasbourg in Alsace began to uncontrollably perform what action continuously over the course of days?
Answer: Dance
This event is known as The Dancing Plague. Unprovoked, villagers began to dance about not knowing why they were doing so and claiming they were unable to stop. After a few days of this continued dance, the people of Strasbourg were dehydrated and collapsing from the strain of this mysterious affliction.