Arthur leaves. The other man does too, but it's Arthur's back he's watching as it disappears through the doors of the costume shop. He does nothing. He says nothing.

Until, "Goodbye, Arthur."

Spoken to an audience of hollow masks. John remains in the center of the aisle, standing, watching the empty doorway.

And when he turns at last and marches away from the door, away from Arthur, he grabs the throat of that automaton clown in passing and dashes it into the floor.