I started tokin weed at age 15, which was 1969. That was quite a weird year. In August, there was the 'peaceful' Woodstock of 500,000 people with no fights, no cops beating heads in...just a 1/2 million peeps having a stoned-groove listening to music.
Then in December, The Stones did the Altamont concert & there was violence at every turn. Kind of ushered-out the 60s on a bad-note. Not quite sure who's brilliant idea it was to get the Angels to be 'security' for the price of all the beer/booze they could drink.
Who actually thought that was smart? Get a bunch of drunken bikers to play 'mob-control'. Not a thing could go wrong with that maneuver.