The slap causes a stumble, not a fall, although it's not enough to save face. There's time for him to turn around and take a swing, but with the maids looking on, he keeps the show to a minimum. Something that has nothing to do with the fact that he has to concentrate to keep his arm from convulsing; worse now than when it happened.

He levels his gaze back at Joshua, still brewing with something. A few more seconds, and he starts towards to door.

Not even a 'bye'. He's hopeless.