I gotta say that was one unique, frightening and realistic breakdown on the Castiel front. I can see him just snapping like that, wanting to break free. He's not one for talking things out, so I can see it building and building. We tend to forget that he's not suppose to be locked in a human meat suit. It's kinda like having a bird caged. So when Cas was yelling there, I felt so bad for him and wanted to hug him tightly. And what a touching scene with Bobby holding him tight.

And I like the shift to Dean's perspective. It made it even more sad that he was eager to tell Cas the good news only to hear this. I like it too the conflict about him staying but also wanting to be with Cas. Oh and this "He might be a dumbass of an angel, but he's our dumbass" So sweet :)