(Dean aims his gun at Sam...)

Dean Winchester: Chuck has to die. He has to! Otherwise he'll keep us tap dancing forever, and I can't live like that, man! I can't live like that! I won't!

Sam Winchester: I know you feel like that right now, okay. I know you do. But you gotta trust me. My entire life, you've protected me... From Dad, from Lucifer, from everything. I didn't always like it, you know, but... it's the one thing in the whole world that I could always count on. It's the only thing I've ever known that was true. So please... put the gun away. Just put it away, and we'll figure it out, Dean, we'll find another way, you and me. We always do.

(Dean puts away his gun...)

Chuck: Are you kidding me?! After everything, all that, you... you did it again!