2x27 - Dragon Ball Z: Dragon Box

Goku acknowledges Ginyu's strength, and sends Kuririn and Gohan off to search for the Dragon Balls, allowing them to escape. Seeing his opportunity, Vegeta flees from battle and takes off after Kuririn and Gohan, leaving Goku to face Ginyu and Jheese alone. Ginyu takes Goku on in one-on-one combat, almost as if to ascertain his abilities!