The Dancing Plague and Laughing Plague
b'There was an instance of mass hysteria in history when a group of 400 people began to dance and couldn\\u2019t stop. They danced until people started dying. Another instance of hysteria happened in a town, but this time it was because of laughter. They laughed for 16 days straight.
Submit your stories: popmediaagency@gmail.com
Get 55% off your Babbel subscription at babbel.com/pop
Our Instagram page: @reddit_explains
'