It's been a while since we've seen Goku, and now he's feeling a little down. He's not sure if it's a slump or not, but he does know that something's up. Goku says that a slump is a sudden physical or spiritual decline that temporarily halts one's growth in his or her technical skills. He thinks that some people are coming out of one of these slumps to get him out of the manga town, and that's okay, he'll just draw more and draw more. He also says that in a slump, you're like, "I'm just going to eat myself to death" . So, he says, you can cure it by going on a training journey. In the cell saga, Goku uses his time chamber and his spirit to train for a new challenge. He wants to go on a two-month tour in one month, and he wants to find a way to get there by himself. He asks one of his friends to go along with him, and they agree. They're back.