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.
Psychedelic signs at Lisa and Johnny's wedding said "Lisa and Johnny Did Their Thing" and "Johnny is Lisa's Old Man."
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."