Disney uses a patented technology called a "Smellitzer" to synchronize scents with specific scenes in their attractions. These scent cannons can fire a precise "puff" of fragrance—such as orange groves in Soarin', burning wood in Spaceship Earth, or salty sea air in Pirates of the Caribbean—exactly as a ride vehicle passes a trigger point. To prevent smells from lingering or mixing (which would create a "muddy" olfactory experience), Disney utilizes sophisticated high-speed ventilation systems and localized air curtains that quickly "scrub" the scent from the air before the next vehicle arrives. Imagineers work with professional perfumers to create these scents, sometimes going through dozens of iterations to ensure the smell triggers the exact emotional response or memory needed for the story. Even the water in rides like Splash Mountain uses specific chemicals (often bromine) that create a distinct "lake" smell recognized by fans worldwide.