[Maybe this time it's different, Cas. Maybe this time, Sam and Dean's necks both snap — and they suddenly collapse into a dead heap at your feet. Isn't that so much more tolerable? Sure beats falling over and over and over.

And as the corpses lay there, as still as death provides, Lucifer steps out from the small clearing he'd been calmly (enjoyably) sightseeing through. Looks down at Cas where he's sitting in the mud, well and truly alone.]

Wow, Castiel — your dreams would make any tortured artist tremble at the amount of source material they could paint. [He walks closer, nudges at Dean's limp arm with the toe of his foot, and then looks with some sympathy at the withered 'angel' in front of him.]

Oh, how far you fall. So far that you even fall through the earth itself.