1969 – Altamont
The Altamont Speedway Free Festival kicked off just one day after the release of Let It Bleed. The chaotic concert that infamously featured the Hells Angels as security resulted in countless injuries and four deaths, including the stabbing death of 18-year-old Meredith Hunter by Hells Angel Alan Passaro.
At the start of "Under My Thumb". Some of the Hells Angels got into a scuffle with Meredith Hunter, age 18, when he attempted to get onstage with other fans. One of the Hells Angels grabbed Hunter's head, punched him, and chased him back into the crowd.