And, of course, Sam isn't dumb. He knows very well why Castiel is doing this and part of him does feel chastised.

The rest of him? Well, the rest of him is going to remind Castiel of the rules and how to handle waiting properly.

"Otis." Sam smiles, though not enough to raise his dimple. And definitely not enough to bring the expression to his eyes. "While I'm sure that your truck is quite comfortable, I'm afraid Cas won't be able to take you up on the tour. We were just getting ready to leave."