I decided to try a sports composite. I used a shot from the Texas AAA Championship game and mask out all but the running back Joel Mckoy of the North Texas Longhorns. Here is the original image.
Next I added a background I photographed at John Clark Stadium, the Longhorns home field. I duplicated the player, scaled it up, and reduced the opacity. Finally I added a texture on top and used the overlay blend mode. Not bad for my first try.