 It then returns to the station in reverse traveling below the brake run track.On May 22, 1984, an accident occurred on "The Edge", a first generation Freefall ride at Marriott's Great America (now Six Flags Great America) in Gurnee, Illinois.A supporting cable snapped, and the mechanism's anti-rollback devices failed to stop the car from plummeting nearly 60 feet to the bottom of the tower.