I saw them play August 29, 1970. Man-Pop Festival. A summer storm tore the outdoor stage apart ruining the PA and all the amps. They moved us into the arena next door where they borrowed amps and a PA from local bands. Zeppelin played on the floor (no stage) and the crowd on the floor sat down so everyone could see. As they started to play one freak started to dance and two local cops moved in the stop him. The crowd roared at them and they backed off and let him dance.
I was 15. Got home just as the sun was coming up. My old man met me at the door and said "Your mother was worried about you all night". I was soaked to the skin and I ruined my 110 camera but I remember it like it was yesterday.