3x41 - Dragon Ball Z: Dragon Box

After being attacked on a mountain road by a boar on her way back from shopping, Chichi's frustration explodes when she sees other couples having fun riding around in aircars! She orders Goku and Piccolo to go get driver's licenses, but at the driving school, the two become so bullheaded with each other, they end up in a dead heat. Then one day, while learning to drive on rainy roads, they witness a kindergarten bus get caught in a landslide...