Exploding Port-a-Potty

Can a person receive third-degree burns if he or she lights a cigarette while inside a port-a-potty? Armed with Adam's "special sample," the build team explores whether human waste can create enough methane to produce an explosive result. Then the MythBusters test whether a broken drive shaft on the front joint of a car vault can cause a car to pole vault after it hits a pothole. Just how high can this car fly?

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S2005E06 - Is Yawning Contagious?