Castiel had to smile at the hug before watching as Ben composed himself somewhat, ready to get back to the Winchester house. Just every once in a while, the angel had to marvel over how there was ever any doubt that Ben was Dean's son, when so many small gestures spoke so much about his paternity.
He hoped Dean wouldn't be too hard on the boy for leaving and trying like this. It was impressive, if a little misguided.
Castiel placed his hand on Ben shoulder before concentrating a moment, taking less than a split second to disappear from the apartment.