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In doing so, Blatty has his cast of colorful lunatics reference a multitude of movies (The Treasure of Sierra Madre, Frankenstein, The Jazz Singer, The Great Escape, Spellbound, and many others), pop culture events, and historical occurrences, in an attempt to expose them all as folly.

Better movies like One Flew Over the Cuckoo�s Nest and Shock Corridor have used the insane asylum as a microcosmic metaphor of our national lunacy, but those films worked to a degree because they didn�t feel like they were exploiting the madness of their characters to make a screenwriter�s statement hold water.