One would think something like having your dead brother threaten you with what looks like a chair leg would be a little more surprising. But after a few long and probably awkward pause where Stannis simply glances at the younger Baratheon... the king in not-at-the-wall-anymore looks like this is on par for the course.

"Must you bother me even here, spirit?" He simply lets go of the handle of his bright sword. It would be a weird sort of dream indeed if he were able to get hurt in it. And Stannis can admit to be afraid of certain things but his brother’s ghost isn’t one of them.

“If it is an apology you seek you will find none coming from me.”