By now many of you will have seen the film from which this marvelous image is plucked — a mash-up of mesdemoiselles pounding the floorboards in Frederick Wiseman’s ballet documentary “LA DANSE.” They’re Paris Opera Ballet dancers hoofing it in Rudolph Nureyev’s version of Tchaikowsky’s “Casse-Noisette” or “The Nutcracker.” It’s my favorite scene in the movie. You gotta see these ...