Other mistake: After the "fat fat fatty" scene, Franz shoots his way in, starting with three bullets into the door lock. Over the next scene he fires about twelve shots, despite the fact he's firing an 8-shot Luger.
The Producers (1967)
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Directed by: Mel Brooks
Starring: Gene Wilder, Kenneth Mars, Dick Shawn, Zero Mostel
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Max Bialystock: Leo, he who hesitates is poor.
Trivia: Although Mel Brooks wrote the film's musical numbers, he isn't music literate. He hummed the songs into a tape recorder, and the music was transcribed by a professional musician.