Freaks
"Freaks" (1932) is an American horror movie by Tod Browning. It is a very unusual film in the sense that it features real people with deformities and handicaps and actually treats them as nice and exceptional men and women. At the time of it's release the movie scared many people and it was even banned in Great Britain for 30 years. During the 1960s the film was rediscovered and reappreciated as a cult movie and a masterpiece.
References
In Fifty-Four Fab, Boss Questions ... and The Fanzine Questionnaire, Zappa named "Freaks" one of his favorite films.
Zappa also cited the film in Data For Sensitive or Critical-sensitive Position as "the most unusual film in our repertoire, now or ever" and as his "favorite film". He incorrectly named the movie's director "Ted Browning" instead of "Tod".