Cannibal! The Musical (originally known as Alferd Packer: The Musical) is a 1993 American independent black comedy musical film directed, written, produced, co-scored by and starring Trey Parker while studying at the University of Colorado at Boulder, before reaching fame with South Park alongside his friend Matt Stone who also stars in and produced the film. It is loosely based on the true story of Alferd Packer and the sordid details of the trip from Utah to Colorado that left his five fellow travelers dead and partially eaten. Trey Parker (credited as Juan Schwartz) stars as Alferd Packer, with frequent collaborators Stone, Dian Bachar, and others playing the supporting roles.
The film began as a 3-minute trailer made for a film class. After the trailer drew much attention, Parker and Stone raised around $125,000 and began shooting the full-length film. The film was shot during weekends and on spring break in 1993, and according to Ian Hardin, most of the crew failed their film history class as a result. Early in shooting, Parker was thrown from one of the horses playing "Liane", fracturing his hip.
(Summary from Wikipedia)