Hahaha yep, I'd imagine it' would be something like this; Crowley sends the boys to an alternate Earth, the WD world. After killing a few zombies, they run into Merle, who holds them at gunpoint ;
Merle : Well, look what we got here, a couple of pretty boys !! Alright, get them hands in the air and lets go. We're gonna have lots of fun.
Dean : Great, looks like we got zapped into George Romero's "Deliverance "
Sam : Relax, Dean and just do what he says.
Dean : Screw that Sam !!! I'm not squealing like a pig for nobody !!