No Time Like the Present

To prepare for this threat, Kami, the guardian of Earth, takes Goku to a special place in the afterlife (or "Other World") for training with the legendary martial arts master of the afterlife, King Kai. But in order to get to King Kai, he must first cross a treacherous path called Snake Way. Only one person has ever successfully crossed it, King Yemma, who judges the souls of the dead. King Yemma tells Goku not to fall off Snake Way or he will never return. Goku starts the long journey by flying over the path, until eventually he runs out of energy and must continue on foot. Back on Planet Earth, Piccolo regenerates his arm and decides to take Gohan (who's still unconscious) under his wing and train him, with the hope of tapping into his hidden power. Piccolo awakens the boy and forces him to train using fear. Bulma studies the circuitry of Raditz's Scouter, and agrees with Master Roshi that Krillin should be the one to tell Chi-Chi the recent news of Goku and Gohan.