0:00 In July 1518, a woman named Frau Troffea walked into a narrow street in Strasbourg and started dancing — and she didn't stop for six days.0:10 No music.0:11 No celebration.0:12 Just...0:12 dancing.0:13 Alone in the street, in the summer heat, until her feet bled and she collapsed from exhaustion.0:20 And here's where it stops being a weird footnote and becomes something you cannot look away from: within a week, thirty-four more people joined her.0:31 By the end of the month, somewhere around four hundred people were dancing uncontrollably in the streets of Strasbourg.0:40 This is the Dancing Plague of 1518 — one of history's most disturbing and flat-out bizarre mass events.0:48 And the part that still gets me, the part that feels like it shouldn't be real?0:54 The authorities saw hundreds of people dancing themselves to death...0:59 and decided the solution was to make them dance more.1:03 So let's back up.1:04 Strasbourg in 1518 — this is not a happy place.1:08 Famine's been grinding through the region for years.1:12 Smallpox and syphilis are tearing through the population.1:16 People are desperate, starving, dying in the streets.1:20 And into this nightmare walks Frau Troffea, and she starts dancing.1:25 At first, people think she's drunk.1:28 Or possessed.1:29 But she doesn't stop.1:30 Day two, day three — she's still going.1:33 Her feet are shredded.1:35 She's drenched in sweat.1:37 And then others start joining her.1:39 Not in some joyful, contagious way — they look terrified.1:43 Witnesses describe people screaming, begging for it to stop, but their bodies won't quit.1:50 They're dancing like they're being puppeteered.1:54 Within weeks, the streets are full of dancers.1:57 Dozens collapse from strokes and heart attacks.2:01 Some just...2:02 drop dead mid-step.2:03 The death toll climbs — estimates range from a dozen to several dozen people, though records from 1518 aren't exactly comprehensive.2:13 The authorities are watching their city convulse, and they have no idea what's happening.2:20 And here's the turn — here's where rational governance just...2:24 breaks.2:25 The Strasbourg city council consults with physicians.2:29 The physicians look at this and conclude: bad blood.2:33 Overheated humors.2:34 The dancers have "hot blood," and the only way to cure hot blood is to let it burn itself out.2:41 So the council's response?2:43 They build wooden stages.2:45 They hire musicians — professional musicians — to play for the dancers.2:50 They encourage more dancing, believing that if people just danced hard enough, long enough, the fever would break.2:59 It didn't work.3:00 Obviously.3:01 The death toll kept rising.3:03 People danced until their feet were stumps of torn flesh.3:07 And the city kept the music going.3:10 So what actually happened here?3:12 Five centuries later, we still don't have a definitive answer, but there are three main theories — and all of them are deeply unsettling in different ways.3:24 Theory one: ergot poisoning.3:26 Ergot's a fungus that grows on rye in wet conditions, and 1518 was a wet year.3:32 When you eat bread made from infected rye, you're ingesting a compound that's chemically similar to LSD.3:40 Ergot poisoning causes convulsions, hallucinations, and — sometimes — spasms that look like dancing.3:47 The problem?3:48 Ergot also causes vasoconstriction.3:51 Your limbs go numb, then gangrenous.3:53 It doesn't give you the stamina to dance for days.3:57 So ergot might explain the start, but it doesn't explain the endurance.4:02 Theory two: mass psychogenic illness.4:05 Basically, stress-induced hysteria spreading through a traumatized population.4:11 Strasbourg in 1518 was a city on the edge of collapse — famine, disease, poverty, no hope in sight.4:19 In that context, one person's breakdown becomes a mirror.4:23 You see someone dancing uncontrollably, your brain is already frayed, and suddenly your body is doing it too.4:31 There's documented cases of this — dancing manias, laughing epidemics, twitching plagues.4:38 They cluster in populations under extreme stress.4:41 And 1518 Strasbourg?4:43 Definitely qualifies.4:45 Theory three: religious fervor tied to St.4:48 Vitus.4:48 In medieval Europe, there was a belief that if you angered St.4:53 Vitus, he'd curse you with uncontrollable dancing.4:57 Some historians think the dancers believed they were already cursed — that they were dancing to appease the saint, or because they thought they'd sinned and this was their punishment.5:10 The line between religious ecstasy and religious terror was thin.5:15 And in a city that desperate, maybe the line disappeared entirely.5:20 Here's what we know for sure: it ended in early September, about two months after it started.5:27 The city council finally banned public dancing and music.5:32 They carted the remaining dancers off to a mountaintop shrine dedicated to — yes — St.5:38 Vitus, where they were prayed over until the compulsion stopped.5:43 And then...5:44 silence.5:44 The Dancing Plague just...5:46 ended.5:47 No grand explanation.5:48 No closure.5:49 Strasbourg moved on, and for centuries, this event was a footnote, a curiosity, something people assumed had been exaggerated.5:59 But the records are clear.6:01 Hundreds of people danced.6:02 Dozens died.6:03 And the authorities built stages and hired musicians because they genuinely believed the cure for uncontrollable dancing was more dancing.6:14 That's not a metaphor.6:15 That's what happened.6:17 And five hundred years later, we still don't fully know why.
