7 Incredible Mass Hysteria Events

The Dancing Plague of 1518
The Dancing Plague of 1518 / Public Domain: Wikimedia Commons (Pieter Breughel the Younger)

From the Dancing Plague of 1518 to the Tanganyika Laughter Epidemic, unusual human behavior can't always be easily explained.

In this episode of The List Show, Mental Floss editor-in-chief Erin McCarthy shares seven unbelievable events of mass hysteria from history.

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