There's a short reprise to the tune of "All I ask of You" in POTO, where the Phantom has been hiding on the roof listening to Raoul and Christine declare their love. They leave, the angel in which he is sitting lowers, and he sings, "I gave you my music, made your song take wing, and now, how you repay me, deny me and BETRAY me. He was bound to love you when he heard you sing, Christine, Christine." In the background, we hear Raoul and Christine singing of their love, and the Phantom snarls (musically, of course), "You will curse the day you did not do, all that the Phantom asked of you."
The next thing, at least in the original show (although not in the movie or the Las Vegas version), Christine takes her bows for her performance in "Il Muto," and the chandelier crashes at her feet.
You alone can make my song take flight.
