Hey 22foxco,
Great work on your first color study. The shadows and highlights are great and the movement of the piece works real well. What I'm about to say is really just knit-picking.
I feel like the shadows on the white pants could be exaggerated a bit more. The lack of definition on the left leg and left arm seem to make them blend together (up near the other guy's head). The movement is enough for the viewer to understand what is happening but I think if the overall coloring was a bit sharper then it wouldn't have this problem.
Did you do this in Photoshop? If so then you might want to take a look at this program
http://www.madewithmischief.com/index.html Its called Mischief. It's designed for digital sketching and painting. It also has an infinite zoom, which allows HD imaging at any scale. There is a free trial download. You might like it more then photoshop.