Yeah, I see what you mean there. Plus, their gravity machine's broken. [Only being able to increase the gravity to ten times the normal amount doesn't mean it's broken, but Goku doesn't see it that way.]

But it's probably better to train that way rather than constantly fighting in those draft things. If you ever got killed out there, you'd lose somethin' important, an' depending on what that is, it'd probably be tough to keep going, right?