Already known for his offbeat performances, Shawn took on his strangest character in Mel Brooks’ The Producers (1968), which starred Zero Mostel and Gene Wilder as the title characters. He played an hippie actor named Lorenzo St. DuBois, or LSD as he was called. His character gets the role of Adolf Hitler in a musical called “Springtime for Hitler” within the film. According to the Los Angeles Times, Shawn once described the role as “an unactable part has to be played by a maniac.”