The “Dancing Mania Plague” was a social phenomenon during the medieval times which caused more than thousands of people to dance erratically, until they collapsed from exhaustion or died. It was widespread in many countries throughout Europe, and the true cause still hasn’t been identified.

Posted Oct 2, 2022, 2:23 AM UTC
1610
Let's be honest.
If you saw that happen before the Renaissance and widespread education, you'd believe in witchcraft, too.