Oh, i like this a whole bunch. Looks fabbo on the blue shirt, love the flash being for the camera shot, the person being shot and just a nice border around the action like a Batman-esque visual sound effect. I'd only suggest making the other figure being shot a different shirt color and possibly a bit differently built, but I'm 5$'ing this one regardless.
I like this a lot, but I agree with FRICKINAWESOME and thinking that the cowboy that is getting shot should have at the very least a different color shirt on. At first glance, I thought it was some sort of reflection. Another thing, although not important is that all good cowboys wear white.
About my design