A horse of course
ROBINS AIR FORCE BASE, Ga. -- Louie Barrientes uses a riding crop to prompt his horse, Regalo, to dance. He has also taught the horse to spin, shake hands and count by stomping his left front hoof. He can say hello by raising his front right hoof, throw kisses and even answer simple "yes or no" questions with a nod or shake of the head. (U.S. Air Force photo by Sue Sapp)