Question: For what ride is Pepper's ghost, an illusion technique, used when the Blue Fairy disappears, leaving a pile of fiber-optic fairy dust on the floor?
Sentence (from "Pinocchio's Daring Journey"): The Pepper's Ghost illusion (used extensively in the Haunted Mansion) is used when the Blue Fairy disappears, leaving a pile of fiber-optic fairy dust on the floor.
Relevant evidence: Yes