The horse’s name is Oreo. He’s six year old, and back in his stable — where it’s safe. That wasn’t the case Thursday afternoon, when police officers finally caught up with Oreo. He broke loose from his carriage and bolted four blocks — from Columbus Circle, all the way to 57th street and Ninth Avenue. Eyewitness Tess Neumann told Pix11’s Jay Dow, “All of a sudden I heard, it sounded like a car crash. And I turned around. And the driver wasn’t holding on.” Other eyewitnesses tell Pix11 the trouble began as the unidentified driver began a trip at the horse stand on Central Park South.