Scary...
Good dark lighting, makes the skull look very menacing. The only thing I would say are that the blue lines at the bottom of the image are a bit distracting. Well cropped.
The skull is a little dark. I know that's what you were going for but I still think it's a little too dark for the effect to come through. I have a calibrated monitor btw. Maybe you saw this as a little brighter on your screen?