The Dancing Mania on This Day in History

This Day in History: A sudden outbreak of the Dancing Mania happened on the streets of Aachen, Germany, on this day in 1374. (I was born in the Aachen area). The Dancing mania (also known as dancing plague, choreomania, St. John's Dance and St. Vitus's Dance) was a social phenomenon that involved groups of people dancing erratically, sometimes thousands at a time. It's hard to explain what caused this mass hysteria. Perhaps some sort of poisoning, others claim demon possession, or high levels of psychological distress. Whatever the cause, people would dance, often to the point of death.

See also The Dancing Mania and the Black Death by JFC Hecker 1859
https://thebookshelf2015.blogspot.com/2015/11/the-dancing-mania-and-black-death-by.html