Then you kill the angel Castiel. And that, I would suspect, — that would hurt something awful.
this just hit me
Dean doesn’t just pat Cas’ shoulder, he pats his shoulder with the hand that wields the blade
right before this he was sitting at the table clenching and unclenching that hand like he couldn’t get rid of the need to have the blade back in it. Then he gets up and uses that hand to touch Cas in a tender way. He reached out to his Collette to help quell the urge to kill
i cant see through my tears
And we all know how symbolic hands on shoulders are for these two