Some barking really would have helped to prepare him for what he's walking in to, but he should have gathered by the lack of it that something horrific was on the other side of the door.

Like Molotov riding Ein. All over his room.

For a long while he makes no movement or change his frozen expression, only eventually his arm moves on its own to shut the door again. Then he turns the lights off for no reason at all. Blessed darkness.

He can still hear the chiming.