South Park Season 3 Episode 2 Spontaneous Combustion

Stan's dad, Randy, believes that he's spontaneously combusting due to his excessive flatulence. As the town's residents fear that they could be the next victim of the mysterious phenomenon, the boys try to solve the case alongside the local scientist. Meanwhile, Chef, inspired by a recent break-up, takes up karaoke singing and begins to attract a very particular audience. As the boys attempt to solve the combustions happening throughout the town, they find themselves in grave danger. Ultimately, the true cause of the spontaneous combustions is revealed, and the town takes preventive measures to ensure that they don't happen again.