Dragon Ball Kai

Synopsis

King Kai has also taught Goku the Spirit Bomb technique, and tests Goku's ability to create a Spirit Bomb with a large brick as a target; Goku destroys it with no problems. However, King Kai warns Goku of the potential danger of creating a Spirit Bomb on Earth. So Goku decides to only use it as a last resort. With his training complete, Goku is ready to be resurrected. Only then is it revealed that the Saiyans will be arriving sooner than the expected; additionally, King Kai had forgotten to allow sufficient time for Goku to travel back along Snake Way to reach Earth before the Saiyans arrive there. Goku sends an urgent telepathic message to Master Roshi via King Kai's telepathy, insisting that the Dragon Balls be used to resurrect him with all possible haste. On Earth, Roshi, Bulma, and Oolong summon the Eternal Dragon Shenron and fulfill Goku's wish. Goku then begins the long journey back along Snake Way; with all of his training, increased strength and speed, and new techniques, the return journey will be far quicker than the original. The next day, the Saiyans Vegeta and Nappa land on Earth to begin their search for the Dragon Balls.

(Source: Wikipedia)