pleased to meet you, hope you guess my name

“Just keep still; keep together!”

6 December, 1969: A free live performance by the Rolling Stones at Altamont of “Sympathy for the Devil” with Hells Angels doing security descends into chaos.

Screenshot of the infamous Altamont concert from the film "Gimme Shelter"

Screenshot of the infamous Altamont concert from the film “Gimme Shelter”