I agree that this is a fascinating and amusing shot. What's most pleasantly surprising is that, despite the wild motion, the face is tack-sharp. Well done!
Mixed bag:
Good headshot, though you probably shouldn't lop off the edge of his ear.
The lighting of the overall scene is intriguing, but the model needs some spotlight on her.
Not a keeper:
IMO.
Legs and guitar and the silhouette of the back of a head don't quite cut it. It would be especially useless in a model's portfolio.