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In a Dennis concert I attended, Dennis said that Tommy was dating Linda Blair at the time Castle Walls was written, and as a gag, he used the music from The Exorcist as an inspiration for the synth part of the song.
In a Dennis concert I attended, Dennis said that Tommy was dating Linda Blair at the time Castle Walls was written, and as a gag, he used the music from The Exorcist as an inspiration for the synth part of the song.