Chapter: 518 (DBZ 324), P2.4-8
Context: Vegeta asks Goku why he’s entering the next Tenkaichi Budoukai
Goku: “Because someone’s entering who seems incredible! I’ve had my eye on him for awhile, and he came to the tournament grounds this morning.”
Vegeta: “What!? …I don’t feel any ki that strong…”
Goku: “He’s completely suppressing his ki now. ..But somehow I can tell…that he’s definitely strong…”
Vegeta: “…Hmph, are you joking? There’s no way a guy like that could exist…Don’t tell me he’s an alien!?”
Goku: “Nope, he’s an Earthling.”
Bulma: “Huh!? That’s impossible.”