Sam's eyes fluttered, but showed no recognition. He tensed, his entire body went taught. Nerves bulged in his neck, along his cheek. His back arched off the bed, and he held the position for a long moment before he sagged back down on the mattress.
His head turned side to side, as if fighting off some unseen force. His breath came hard, forced. In his mind, he was trapped in hell, subject to Lucifer's torments. Lucifer was a master of torment, he knew how to pull Sam right to the edge of his endurance, then pull him back to start the process all over again.