A horse-drawn carriage driver was hospitalized in critical condition after the animal bolted for blocks through midtown Manhattan, crashing into a station wagon and leaving the man in a pool of blood, witnesses and police said. "It was horrifying,'' said Robyn Hussa, who saw the horse racing through traffic Monday night. "It was like a nightmare.'' The horse, which had no passengers in its carriage, smashed into the station wagon at 50th Street and Ninth Avenue around 9:30 p.m., injuring two men in the car, fire department Chief Jim Hodgens said. The carriage driver was thrown into the street, which...