Arthur is absorbed in the music and doesn't see them come in. He only notices them when ripples of faint unease in the crowd reach the stage. It hits the same niggling note in the back of his head that's been overactive during performances recently; he's used to it.

The new song finishes, and he calls the next one, House of the Rising Sun. He arranged it a bit; their version trades off between the perspective of the mother and son, and vocals trade with them.