The Wilhelm Scream and its history. "After learning the significance of the scream while it was being put into "Reservoir Dogs" (1992), Quentin Tarantino called a break from its mix so that he and his sound crew could crowd into a nearby room with a small TV to watch "Distant Drums" on a local station to hear the scream."
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Just saw Transformers with my son, and I heard ol' Wilhelm. It turned out to be a very good mindless action flick.