The Phantom: You will curse the day you did not do, all that the Phantom asked of you!
At the end when Meg steps out of the water, her pants are wet. However, when she enters the bedroom and finds the Phantom's mask, her pants are perfectly dry.
In one of the 1919 flashback scenes, Raoul looks out of the car window at a Swarovski jewelry store. The Swarovski crystal company made the chandelier for the film, valued at over $1.3 million.