Castiel's hand dropped at the energy of the response, and though it wouldn't be noticeable to most, his expression softened. No trouble, then. Good. He didn't want to deal with more.
His expression didn't change, eyes following the others' to the marks on his arms, and he turned his head to the smell of the pizza.
"Yes. I was going for the pizza," he said tonelessly. Pizza was good, almost as good as cheeseburgers. He didn't tell Dean things like that anymore, though.
He looked back at the alley. "I heard a crash. It could have been an accident. Could have been fighting." It didn't seem like the second, though, so he would leave it be. He walked to pizza shop without saying anything else, though he stopped just inside and held the door open for the other. He inhaled deeply as the warm air and smell hit him more forcefully. He was surprised that it felt good, deep inside, even if it also felt strange. He hadn't expected to see a pizza shop again.