I ran sound for a comedy troupe called "The Garrens" back in the mid-90's, and one of their largest performances was to be held at a Brigham Young University freshman orientation event. There were about 2,000 kids (even then they looked like kids to me) in attendance.
There was a dance before the show, and the huge floor area was packed. The DJ's stage was in the middle of it all, and I was up there with him setting up the gear for The Garrens while he dropped jams, or mixes, or beats, or whatever you kids call that stuff. The heads and shoulders of 2,000 freshmen were a tumultous, rhythmic sea that came up to my knees.
Then the DJ dropped in "Macarena," and there was order in the chaos. Like iron filings in Hell's own magnetic field, 2,000 freshmen aligned themselves and oscillated in unison.
It was amazing, and just a little frightening. This was the sort of power supervillians crave, and it was being used as a party game.