Dean: Are you kidding me? I have been on red alert about Sam and you come for some stupid horn? Castiel: You asked me to be here and I came. Dean: I've been asking you for days you d**k!
Bobby: There's a worse case scenario. Dean: What? Saying he's my co-pilot? Yeah, I know. Bobby: No, that'd be the other worst case. Dean: Then what? Bobby: Maybe it's just Sam.