"Yeah, uh... Thanks, but I don't understand any of that." He says it cheerfully enough; his ignorance and stupidity are something he's long accepted. Besides, it doesn't really matter what she means--the flames are cool and that's that.

He sniffs for the smell of any lingering gasoline or alcohol she might have used for the trick, but... as near as he can tell, it is no trick.

He leans back. "So you can do that any time you want? I guess it makes sense why you didn't bring anything, then."

Perhaps he's a tad embarrassed as he rubs the back of his neck and then turns to check on the soup. But he's not exactly ponying up an apology for his overreaction.