The Winthrops' car is a 1968 Chrysler Imperial Convertible; fewer than 500 of these rolled out of the factory that year, ranking it as one of the rarest and most rarely-seen passenger vehicles of that era.
Hairy-chested George Chakiris was subjected to a complete body waxing so as to appear less virile in his shirtless scenes.
Graffiti written on the walls of the club, The Trip, include: "ACID is LoVE - CUBE the FUZZ"; "SMILE"; "iCARUS is COMING - SO am I"; and "GRASS is GOOD."
Psychedelic signs at Lisa and Johnny's wedding said "Lisa and Johnny Did Their Thing" and "Johnny is Lisa's Old Man."