Endings are hard. Any chapped-ass monkey with a keyboard can poop out a beginning, but endings are impossible. You try to tie up every loose end, but you never can. The fans are always gonna bitch. There's always gonna be holes. And since it's the ending, it's all supposed to add up to something. I'm telling you, they're a raging pain in the ass.
Dean: Where's Cass? Chuck: He's dead. Or gone. The archangel smote the crap out of him. I'm sorry. Dean: You're sure? I mean, maybe he just vanished into the light or something. Chuck: Oh, no. He exploded. Like a water balloon of chunky soup.