###The Dancing Plague of Strasbourg
Strasbourg, 1518 — When one woman started dancing uncontrollably in the street, hundreds more joined her in a bizarre, month-long involuntary trance.
On July 14, 1518, a woman known as Frau Troffea stepped into a narrow street in Strasbourg and started dancing in total silence. She didn't stop. She danced for almost a week until she collapsed from sheer exhaustion, kicking off one of the strangest medical events in history.
Frau Troffea wasn't faking it. She was suffering from mass psychogenic illness—a bizarre condition where severe stress makes the brain trigger real, involuntary physical symptoms. Because human brains are wired to mimic others, her neighbors subconsciously caught the bug. Soon, dozens of exhausted people were shuffling and leaping through the streets.
By August, the crowd of involuntary dancers had swelled to nearly 400. Desperate to stop the chaos, city officials decided the best medical cure was for everyone to just "dance it out." When their ridiculous solution backfired, authorities finally banned public dancing, and the exhausted citizens slowly stopped twitching by September.
The Dancing Plague of Strasbourg — Strasbourg, 1518