The key film (1960) in the Roger Corman legend. Shot in two days on an invisible budget, it's one of the most grotesque and extreme of black comedies, the story of a poor schlub whose pet plant develops an appetite for human blood, crooning "Feed me! Feeeeed me!" as our hero goes out in search of fresh victims. Not for all tastes (and probably not for tasteful people at all), it's still a grungy wonder. Jack Nicholson makes an early appearance in a bit as a masochistic dental patient.