ect with American audiences" (Benshoff p.3). Many sub genres of a similar style came out at this time. These genres included biker movies, youth movies and drug films.
             The LSD film is often thought of as a sub genre of the head film. "The head film is the type of movie that is either specifically produced to be specifically experienced on drugs or that has subsequently been identified by drug users as a film that can be pleasurably enhanced by the ingestion of mind altering chemicals." (Benshoff p.4). Of these chemicals marijuana and LSD are the most popular. The exact difference between an LSD film and a head film is that the viewer identifies head films. Head films encompass all genres (comedies, musicals, action) and they are labeled as such by the "user" or the audience member.
             Rick Altman believes that the "Hollywood genres that have proven the most durable are precisely those that have established the most coherent syntax (the western, the musical); those that disappear the quickest depend entirely
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