If You're Not A Professional Actor - Frank Zappa & the Mothers

FZ: If you're not a professional actor, the easiest thing for you to do, when you only have a week to make a movie is just to be yourself on the screen, so the lines that the people speak in the film, with the exception of some of the real fantasy characters like the Vacuum Cleaner, or the, or what Theodore Bikel says, are all based on the actual speech patterns and the lifestyle of the people who are in the group.