I'm glad you shared how you accomplished this. I was wondering. I like the lighting and I like the border, which seems to be a problem for some people. My only regret is that I can't see the top of the primary skull. That makes it feel like the border in intruding on the image.
Defenitly different, I like how you lit the shot... don't think the choice of subject will be to every1s taste tho... hehhehe works for me, apart from the border but yea.. good luck