On this day: June 9

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1965 • neutral • 5 views

The 1965 Columbine School Nervous Episode: an early documented school mass hysteria case

A 1960s-era high school hallway with students in period-appropriate clothing gathered in small groups outside classrooms, some seated or leaning against lockers, conveying concern and whispered discussion.

On June 9, 1965, students and staff at Columbine High School (Colorado) experienced a sudden outbreak of fainting, nausea, and tremors later identified by authorities as mass psychogenic illness; police and medical teams found no toxic agent but noted rapid social spread of symptoms.

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