Aziraphale blinks up at the man who approaches -- human, so far as he can tell -- and sits silently while he is serenaded by a song whose lyrics he does not recognize, but melody that he has heard many times before.

"Ah..." he says when the stranger is done, before clapping politely at the performance. What sort of dare prompted this? "Lovely rendition of In the Hall of the Mountain King. What were those numbers that you were rattling off to the tune of it?"