Can these two gas-tronauts save the universe's butt? Willy and Peter need to get as far as possible from their sister's dumb kindergarten pageant. But they never expected to blast their butts into space! There they make a disgusting discovery that could wipe out the Moon in one gross stink bomb. Do they have enough gas in their guts to repel gassy green aliens from Uranus? Can farts alone rocket them back to earth? And how did their sister's hamster get into the space capsule and chew up all the wires?