7x41 - Dragon Ball Z: Dragon Box

Oob is unaware of how to use his Ki, as well as how to fly, but during his match with Goku, he quickly learns how best to match up against him, and is soon fighting Goku toe-to-toe! The spectators, as well as all of Goku's friends, are stunned. Goku stops the fight in the middle, and extends his hand to Oob. He offers to teach Oob how to fight. Then, with Oob riding on his back, Goku takes off and leaves the tournament grounds.