He mustn't scream. If he screams they'll come back, Lisbon and Doctor Stewart and the porters with the restraints.

'Scream all you want, brother mine.' Lucifer leans forward, and the bedsprings squeal. 'That's what Sam did.'

Sam. He's doing this for Sam. For Sam and for Dean.

'Oh come on, baby brother. You really think a little bit of bed rest is going to make everything okay again? They'll still hate you. '

Castiel digs his nails into his palms and tries not to breathe, because a breath so easily turns into a cry, and oh god, he mustn't scream.