Happening in Seebach Monstershow
(1969)

Monster show in the former Mattenhof gravel pit, Zurich Seebach, after dark. There was a circular runway for model airplanes, 50 meters in diameter. A strip of sawdust was drawn around it, soaked in petrol and set alight. Four drummers were positioned around the circle of fire, one started drumming and the others joined in for an improvised session.