I watched it with Klavier who had to bear my shrieks and freaksouts, but really it was the beginning and the last scene that really. Got to me. I mean, the bit about Dean hoping for God, that I knew would show up. Because they've been hinting at it since like what, near the end of S4?
But my heart broke when little Sam gave Dean a hug and Dean literally froze for a second there. Ahh, I've never felt so bad for him before like I did for this episode. I'm going to rewatch it again solo and I probably might burst into tears.