A teenager thrown to the ground Wednesday when a Central Park carriage horse bolted away from its driver has died, according to police.The 18-year-old was riding in the horse-drawn carriage with three other passengers when the accident happened just before 3pm, according to the New York Police Department. At least two passengers were sent flying out of the careening cab.The teenager was initially hospitalised in critical condition, while the other passengers refused medical treatment. The four...