This turned out really nice. I don't know when the deadline is but if you have time I'd try to paint the shattering rock like it's in motion rather than using blur. I remember Jon posted something about hating seeing the use of motion blur in photoshop. He also called me out on it in a one on one review.
Thanks Joe! The deadline was the last Sunday. I updated this version with less of the motion blur effect and more painted edges but that is as far as I can go for right now. Thanks so much for the crit!