Awesome... you've captured the perfect creepy night-time feel here. Reading through the other coments... IMO, it is NOT too dark! ;) If anything, I would have actually made the subject slightly darker, so he and the chair don't pop out quite so much. More subtle that way. Very neat shot, and very neat idea!
I don't think it's doo dark either. I think it fits the mood, and there's really nice lighting on your subject. I didn't get to this in the voting, but I know I would have given it MUCH higher than a 5.2!!!