Rhinoceros

The residents of a large town are inexplicably turning into rhinoceroses. Stanley (Gene Wilder), a mild-mannered office clerk, watches the bizarre transformations from a bemused distance. But soon the strange occurrences invade his personal space, as his neighbor and best friend John (Zero Mostel) and his girlfriend Daisy (Karen Black) become part of the human-into-rhinoceros metamorphosis that is taking place. Eventually, Stanley realizes that he may be the only human left amidst the new rhinoceros majority.