Everytime I watch this episode, and this specific scene, I keep thinking how Sam redressed his brothers body before he buried him. Had to clean Dean down, clean away the blood and ripped skin. Had to sit with him and know that this was it. Dean was gone.Cried over Deans body, eyes blurry and nose running. Had to make himself calm down and get a grip. Ran his fingers through Deans hair one last time as he carried his body to the Impala.
I could be very wrong about this. But in my head it’s what happened.