The Legend of the Saiyans

Goku's next task is to hit Gregory, a super fast grasshopper, with a heavy hammer. Amazed at how quickly Goku can conquer the gravity, King Kai decides to teach him the techniques Kaio-Ken and Spirit Bomb. King Kai also reveals information about Goku's Saiyan heritage. Goku learns the planet Vegeta had vanished and he was among only four Saiyan survivors.