Dean's eyes moved up to Castiel's, his mouth started to pull off the shaft in his mouth as a frown overtook his face. Cas was trying to warn him!?! He wasn't prepared for the hand that gripped his neck so suddenly, crushing, cutting off his air and leaving him clawing frantically with wide, terrified eyes.

When Cas stopped trying to pass on information Lucifer's grip lessened and Dean gasped in a lungful of air, his breathing labored for a moment as he stared at the being before him with eyes full of terror.

He was afraid for a moment, afraid he would be made to pay for Castiel's error. And he would...he would gladly pay for it but he honestly hoped he didn't have too. "Just evict him Cas...this isn't worth it. He isn't worth it!"