He's not entirely sure but it sounds like Carter might not have been happy with his reaction. Or it could be anything else.

He doesn't give it any mind, and dismisses it as they continue to walk to the town. Carter's fine. He'd say something if he wasn't fine. He was serious about that work-up, though. He makes it a note to see if he can get some samples of that fog sometime.

"This place is..."

Weird.

"Empty."