Your style here is surrealism at its finest, and that's not idle gushing. The grim, black and white and almost photo-realistic shading brings me back to the finest works of artists like Robert Crumb and Andy Warhol. The subtle comedy of a villain standing complienty wit his hands raised over his head while a hole is literally blown through his head is hillarious, and the detail of the gun-soke trailing up out of his facial cavity completes the effect.
My only complaint is a slight inconsistentcy in perspective. The shot-gun looks as if it is slightly twisted to the hero's left, and the size of the villain's right arm contradicts the three-quarters perspective suggested by the direction of his head.