The airline refused him for their flight Despite his being quite polite. He then attempted to board a train But was informed he couldn't remain. He headed for a subway station next Which at first seemed to be a safe bet, Until he yelled, “Get out of my way,” Followed by an impatient neigh, And everyone around him turned to stare At the strange creature standing there. For no one had noticed from afar, That plain old Jack was in fact a centaur.