She got knocked off her high horse. Wild footage shows a crazed, self-righteous animal rights activist smacking a horse-drawn carriage driver in the face with her skateboard in Central Park — before cops arrested her for felony assault, police said Wednesday. Sanctimonious skate punk Abigail Holbrook, 27, of Philadelphia first unleashed an unhinged tirade about “animal abuse” Tuesday on 59th Street near West Drive, according to footage shot by one of the drivers. “You’re animal abusers! Horses do not do well in New York City. They are very sensitive to light and noise,” she shouted, according to the video. “I’m...