A Disneyland ride turned into a terrifying scene when a 13-year-old boy climbed out of a moving log on Tiana's Bayou Adventure just before the attraction's massive final drop.Video shows the teen sliding down the ride's 50-foot waterfall as shocked guests watched from above. Disneyland says the ride was immediately stopped and the boy was later evaluated at a hospital.Authorities said he did not suffer any serious injuries and was later released.