Daytime at Bobby's Auto Salvage Yard and Victorian Mansion that has too many rooms to count, but none suitable to serve as a guest room: The camera pans down from the panic room's Devil's Trap/ventilation system to Bobby's Bo Derek poster, as Dean tells Anna, "Iron walls drenched in salt." Yeah, I know. "Demons can't even touch the joint."
Ruby says, "Which I find racist, by the way." Heh. Dean tells her to write her Congressman, but Ruby ignores that and tosses him hex bags. And if she can do that, how is this safe room of any use. I mean, generally speaking, what's to prevent a demon from -- oh say -- throwing a grenade (or something else that will breach the walls or kill the occupants) down the ventilation system. Ruby tells Dean those hex bags are "Extra crunchy. They'll hide us from angels, demons -- all comers."
Dean says, "Thanks Ruby." She strokes out from the shock of it all, and dies (I shouldn't tease the Ruby haters like that), or possibly, she smiles at him with her eyes until he can no longer hold her gaze. He gives a hex bag to Anna and asks her what's playing on W-A-N-G. She reports radio silence, which any parent can tell you is far more chilling than chatter. She asks Dean if they're scared. He and Ruby share a solemn look, then with a charming smile, he lies like the LYING LIAR WHO LIES that he is, and tells Anna, "Nah." Just then, Sam summons Dean from upstairs. On his way to heeding his brother's call, Dean tells Ruby to keep an eye on Anna. Mind you, Anna is ensconced in the panic room Ruby can't enter -- the very same panic room Ruby just noted she cannot enter -- so let's hope she screams for help good and loud, because that's about all she'll be able to do, should Anna require assistance of some kind. Oh, and then Dean leaves the panic room door open, which seems to weaken its concept, somehow. I mean, why does it need walls and a roof, then? Bobby could have saved a lot of time and effort just laying an iron circle on the floor, if you're going to leave it wide open anyhow, Show.