In 1969, this day birthed one of the most infamous — and catastrophic — music festivals of all time. The Rolling Stones not only decided to play a festival at the Altamont Raceway Park, but they did so for free with the beer-paid security of Hell’s Angels.

As a result of this dreadful plan, Mick Jagger was punched, several fans were assaulted, and four people died. One of them, Meredith Hunter, was stabbed by a Hell’s Angel after revealing a gun. I think we can all agree this was a rather curt and exceptionally violent ending to the hippie peace movement.

As crazy as the modern youth like to think they are, our modern-day Coachellas, Lollapaloozas, and Bannaroos have never seen such tragedy. If you would like to learn more on this historical event, check out the Rolling Stones documentary  Gimme Shelter.