In addition to freezing motion, Vicki and I also explored the realm of shadow.
The holy trinity of key, fill and back light is well established. It is the classic, textbook lighting setup. However it does get tired pretty quickly. The back light defines the form of the subject's shadow side - it adds dimension and separates the foreground from the background. This is the conventional wisdom.
But is it the only way of defining form? Of course not.
For our shoot, I eliminated fill and back lighting entirely. Instead of fighting the resulting silhouette I chose to embrace it, using the crisp, dark outline to define the shape of Vicki's body. What can be done with light can often be done with shadow too, it seems. A few more examples can be seen in my post on freezing motion.
Using shadow to remodel the face.