In 1926, Herbert Sellner finished his design for the Tilt-A-Whirl and began building one in his backyard. Sellner's ride involved seven cars attached at various fixed pivot points on a rotating platform that raised and lowered itself. The cars themselves were free spinning, but when you added the centrifugal force and the platform's gravitational pull on the cars, they would wildly spin in countless directions at variable speeds. Calculated chaos ensued. Since then, Sellner Manufacturing Company has built more than 1,000 Tilt-A-Whirls and inspired hundreds of knockoffs. Those who look a little green or lose their lunch of hot dogs, cotton candy, and soda pop are probably just coming off a Tilt-A-Whirl.