(it's okay; Dean doesn't really need details).

Are you kidding? Of course, Dean wants one. He'll grab for one, take a huge bite and place it on the plate next to what's left of his pie. For the moment, Cas will have to judge Dean's reaction based on the surprised expression on his face; his mouth is far too full to talk. "Really?" He's surprised because it's good. He grins at Cas's use of the idiom and give him a thumbs up.