Dean Winchester is cleaning his weapons, guns, anything to trap Lucifer, anything to kill Michael, when he feels a tremor in the ground.
His first thought is, oh God, please no, let it not be Sam, and he runs outside of the cabin he had been in.
His brother is standing with Jack, and Jack is staring up at Sam in concern.
And Sam, Sam is glowing with grace-light, golden heavenly-light, nothing like the harsh white glare of grace Dean has seen before, and Sam is staring at Jack, and Jack is staring at Sam, staring at Sam's shining halo and Sam's glowing, shifting wings, and Dean just wonders if he's hallucinating.
And then Sam disappears with a crack, a flap of his wings (Dean can't even say that out loud), along with Jack.
Dean runs forward, horror in his expression.
And then he turns around and Lucifer is right in his face and Dean clenches his gun tighter in anger before Lucifer speaks in a pissed-off tone with clenched teeth,
"Well, that didn't work out at all from what I expected." He hears the furious edge of Lucifer's voice and Dean does not flinch away, instead, he grins because finally, finally, Lucifer did not get what he wanted.
And for a second Dean is gleeful, before Lucifer, too, vanishes.
And he's probably located Sam and Jack.