Well, since he has not posted his answer yet, I will hazard a guess. My guess is that she is holding a lovely arabesque position and not jumping as supposed.

http://en.wikipedia.org/wiki/Arabesq...llet_position)


Although toe shoes are flat on the toe, it looks like there is displacement here, so I will guess she is standing on plexiglass. The photographer is below and a bit to the front. I am going to guess this is a two light set up. One camera left fairly high and just behind her arm maybe an octo or other light box; the other light is lower and bit to the front of camera right. My guess is that it is possibly a gobo'd flash.

My knowledge of lighting is not that great but that is my guess. The highlighting here is very nice, IMHO.