South Park (1997)

S3E2 Spontaneous Combustion

Kenny unexpectedly bursts into flames, prompting the mayor to enlist Randy Marsh for a solution. Meanwhile, the boys attempt to assist Kyle's dad with his erectile issues. They come up with a bizarre plan to reenact the Stations of the Cross at church, crucifying Cartman and hoping to wait three days for his resurrection. Ultimately, Randy discovers that the cause of the spontaneous combustions is everyone’s repression of their farts.