Dean rushes around the corner. From the other end of the hallway, he can see everything that's going on between Sam and the demon. It stops him dead in his tracks and it's not clear to me if he stops because he's in shock, or because he realizes he can't disturb Sam. I don't think he's angry though. He seems to be taking it all in. The Knife That Can Kill Anything And Actually Does is lying just inside the doorway, several feet from Sam. The huge demon is trying to advance on Sam. Sam is struggling like hell to exorcise it. Sam sees Dean, and it seems to weaken his concentration for a fraction of a second. The demon closes in. Sam redoubles his efforts. He grabs his head with his non-Pimp Hand of Ipecac; he's clearly in pain. Finally, the black demonic essence smoke starts to flow from the demon's mouth, and Sam's nose bleeds as he really pours on the power. The demon finally falls. Poor Sam looks like he's going to cry. He's still in pain, and his cheeks are flushed. He is face looks all of seven years old. Dean looks on in amazement, as the demon essence burns a hole in the mausoleum floor. Sam, afraid and ashamed, searches his brother's face for a reaction. Dean looks at Sammy like he's seeing him for the first time in a long time.
The motel: As Sam packs his clothes, a title card informs us that it's the day after Halloween. Uriel appears on the couch behind Sam. "Tomorrow is November 2nd. It's an anniversary for you, right?" Sam asks him what he's doing there. Uriel isn't inclined to answer the mud monkey's question. "It's the day Azazel killed your mother, and 22 years later -- your girlfriend, too. Must be difficult to bear, yet you brazenly use the powers he gave you -- his profane blood pumping through your veins." Meeee-ow. Sam says, "Excuse me?" Uriel reminds Sam he was told not to use his abilities, but Sam wants to know what he was supposed to do -- let the demon kill him, Dean and everyone? Uriel says, "You were told not to." Sammy starts to recap what would have happened had Sam Hain gotten loose in town, but Uriel cuts him off, to point out that Sam's been warned twice now. Sam says, "You know, my brother was right about you. You are dicks." Oh Sam, Castiel isn't a dick. He just has Angelpergers. A shadow falls across Sam. We hear the flapping of wings, and Sam's hair is blown back. Uriel is now right in front of him. Uriel warns him that as soon as Sam stops being useful, he will turn him to dust. "As for your brother, tell him maybe he should climb off that high horse of his. Ask Dean what he remembers from Hell." Sam's eyes double in size. We hear the flapping of wings, and Uriel is no longer in the room. Sam looks around, in shock.