Tumor Circus was a collaboration between Jello Biafra and members of Steel Pole Bath Tub and Grong Grong. They released one self-titled album in 1991.

The song "The Man with the Corkscrew Eyes" features a sound clip from The Fever (The Twilight Zone) at the beginning of the song: "This machine... It's inhuman, the way it lets you win a little then takes it all back. It teases you. It holds out promises and wields you. It sucks you in and then..."

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