Equal parts Heart of Darkness and Spinal Tap, Rain of Madness delivers hilarious "behind-the-scenes" footage from the spoof of a Vietnam war epic touted as "the biggest war film ever, Tropic Thunder

Rain of Madness supplements Thunder's send-up of Hollywood stereotypes with pseudo-interviews with the amusingly inept cast and crew, including off-the-wall sessions with Robert Downey Jr. playing Aussie megastar Kirk Lazarus and Jack Black as drug-addicted celeb Jack Portnoy.

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