I was 17, and a bunch of us decided to drive up to The City (SF) to see 200 Motels. An acquaintance and I split a blue tab of LSD we bought off a 14 yr old. The 4 of us smoked hash all the way up, at least a 50 minutes drive if traffic had been good.
The old theater lobby had been painted red and black, and the walls oscillated and pulsated wildly as we walked through. We sat through the movie at least twice. The first time through, I couldn't really separate the promo film from the actual movie. There were lots of pendulums swinging around, I remember.
It was really, really flippy on acid. My fellow tripper left the theater midway through the 1st time through and hid out in the bathroom. He claimed Zappa was the devil, leading him, guiding him on paths of pseudo-Karmic-negligence in the very midst of his drug-induced nocturnal emission (ewww, on the pillows) and subsequently moved to Oakland, found Christ and got married, not necessarily in that order.