At this point, Zoro already figured that whatever this woman was talking about was pretty much one of those things that were unique to her island, or whatever it was she lived on. Seeing the objects she described would have helped but Zoro didn't have a problem just labeling them "mystery machines" for now.

He didn't like how much that sounded like Luffy in his head but had to admit to himself that he most likely wouldn't have understood a more comprehensive explanation. Not if he wasn't interested, anyway. His only comfort was that the chef wasn't quite around to hear him admit as much.

Zoro didn't like the look she was giving him, it reminded him too much of Nami when the navigator was reminding Zoro of how much, exactly, he owed her and the why, when, where, and what of the deal he never really remembered agreeing too. Only this look had less thought of debt and more of a "are you stupid?" question about it.

Eyebrow quirking, Zoro scratched the back of his head before shaking it in annoyance. "Nah, never mind. Forget I asked..."

And then a thought struck him. "Oh, wait. Is that like that thing that brought us into town?" The description was a little fuzzy, but Zoro thought it could fit if he mentally squinted enough.