[Ginji doesn't seem to have noticed yet. Or if he has, he's giving Sokka the benefit of a doubt here.]

Oh really? I'm sorry to hear that. Is there some reason you decided to quit working with them?

[Hm.] So they use the fifth fonon? --Oh sorry. I guess that'd mean they're powered by heat energy, right? And that heat would somehow generate enough lift to keep the craft in the air... [He's trying to work out said details.]