Great idea, nice shot, interesting contrast in colors. Great sense of motion in the hammer. A little more light on the camera to make it stand out from the background would have been interesting.
You've got a very cool sense of motion and "impending doom", but it feels like the photo is lacking in vibrance. The composition is pretty straight on and nothing (other than the hammer) pops out at the viewer. Maybe white posterboard for the mat instead of cloth? *shrug* There's a lot to play with.