Dragon Ball Kai • S01E58 : Goku's New Technique, Instant Movement! Special Training Staked on 3 Years From Now
Vegeta asks Goku how he managed to survive Planet Namek's destruction. Goku then explains that just seconds before Namek exploded, he found one of the Ginyu Force's space pods and used it to escape. He further explains that he eventually landed on Planet Yardrat and was nursed back to health by the friendly inhabitants of the planet. He also reveals that he learned from them a special teleportation technique called "Instant Transmission." The Z Fighters then go their separate ways to each begin preparing themselves for the androids' assault. After three years of intense training, they all head off to meet on the island that Trunks informed Goku where the androids will begin their attack.