Tanganyika Laughter Epidemic
The Tanganyika laughter epidemic of 1962 was a case of mass hysteria, also known as mass psychogenic illness (MPI), that reportedly took place in the village of Kashasha, near Lake Victoria in what is now Tanzania. The event involved widespread uncontrollable laughter affecting the local population.
#6 Actually a really cool list
#19 I remember when I first found out that the Roman statues used to be paint to make them appear lifelike. Creepy.