AN: Ok, look, in my defense, there have been a lot of gifs from All Hell Breaks Loose on tumblr today, therefore, this just kind of happened. I apologize in advance for your tears.
Dimly, he knew he shouldn't be surprised that Jake had stabbed him in the back in the most literal sense possible. But he was, because he was Sam Winchester, and even though he had witnessed more evil than any twenty-three year old should even know exists, he still looked for the good in people.
So really, when he felt the knife slide into his back, there shouldn't have been a jolt of surprise, but there was. He fell to his knees, now to weak to stand, but he wasn't concerned with himself, because Dean had a look of pure terror on his face, and Sam had never seen him so scared.
Dean was babbling, words pouring from his mouth like a water fall, but Sam couldn't understand the words, couldn't hear them properly, as if there was a glass wall between them. That wasn't right, there shouldn't be anything between them, they were Sam and Dean, they were meant to be fighting evil sons of bitches together until they died.
But now he was dying. Without Dean. He'd always imagined they'd be going out together, but now he was dying, and he was going to leave Dean just like Dad had, except then he'd had Sam. Now he'd have nothing.
Sam tried to fight, tried to hang on for Dean, because Dean needed him, but he was slipping, his eyes had already fallen shut of their own accord, his body limp, and there was just this sense of complete wrongness that he couldn't conquer.
He heard Dean scream his name and then there was nothing.