Thanks Archangel, yes it is a 15 second exposure. The feet are there they just blended well with the leaves behind her. The shape of her dress also helps I think.
What we did was have here stand still for 5 seconds then quickly move back and forth for 5 seconds that is how we got the "glow" around her. I also think it helped blur the feet a bit. Then for the last 5 seconds she darted out of the frame.
Very nice!! Personally, I'd much rather see honest-to-goodness fancy camerawork, as opposed to Photoshopping done later... and this is an excellent example of awesome camerawork. I am very impressed!