Indeed the special effects of the movie were should be praised, but the story line was a minute long so the film shouild have been of 30 minutes. The scene of changing an invisible ape to visible, visible man to invisible and invisible man back to visible.
But the Hollowman was doing lots of things, without motive. Why was he running arround to kill his parteners. Ok I agree he was fond of girls but, he was invisible, he could have run away and left his friends all alone and enjoy all alone