Ancient legend holds that high in the Himalayan Mountains lives an enormous creature that fiercely guards the route to Mount Everest. Now that legend roars dramatically to life at Disney's Animal Kingdom in a new runaway train adventure that combines coaster-like thrills with the excitement of a close encounter of the hairy kind. Expedition Everest is part of the 18-month "Happiest Celebration on Earth," the jubilee honoring 50 years of Disney theme parks and commemorating the 1955 opening of Disneyland. The celebration began May 5, 2005, with the launch of the largest lineup of new shows and attractions and continues through 2006. Walt Disney World guests will discover for themselves the fearsome lore of the yeti when Expedition Everest peaks in early 2006 at Disney's Animal Kingdom theme park. Aboard out-of-control railcars screaming forward and backward, white-knuckle adventurers swoop into the unknown, braving twists, turns and drops inside and outside a mighty mountain leading to an unforgettable encounter.