I didn't go to california jam but watched it on tv later that year on some kind of late night replay deal they negotiated. I put my cassette player in front of the tv speaker, put in a fresh tape, and recorded it, then listened to that thing a ton. First time hearing most of those groups because as a lost little high school freshman, I desperately wanted to be more cool and thought this was a way to accomplish that. I also used to buy motocross magazines and tried to make myself hip that way. It worked beautifully.