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?
Pinocchio's Daring Journey: Pinocchio's Daring Journey is a dark ride at Disneyland in California; Tokyo Disneyland; and the Disneyland Park in Paris. 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.
i don't know