Near the ending... (SPOILER)
Near the ending, in the scene that Christine realizes that Erik is the Phantom, while listening to "Don Juan Triumphant", Robert Englund enters behind her and says "How do you like it?", is rearly identical to the scene in "The Shining" (1980) when Wendy (Shelley Duval) finds Jack's (Jack Nicholson) manuscript in the lounge and he comes behind her saying "How do you liked it?".
Is this a reference to "The Shining"? Does anybody agree with me?