Psych-Out

This film was meant to perform the same function in relation to the earlier and similar film The Trip (1967). Jack Nicholson had written a script that director Richard Rush thought was too "experimental" for mainstream cinema, so the concept of a 'youth" film based in San Francisco and dealing with flower power and drugs was taken over by other writers. Nicholson eventually did not receive any screen credit for his work, although he took what was essentially the male lead role in the film; however, he did get to write the part of Stoney into it for himself as part of the package.

When Jenny, who is deaf, is in Stoney's bedroom for the first time, she reacts to the sound of the cat meowing.

The film was unreleased in the UK until 1972, after the junkyard fight between the thugs and the hippies was heavily cut at the behest of the BBFC. All later UK home video releases present the scene completely uncut.