Its' a clean shot; your bullet passes straight through his right eye, narrowly evading the obstruction of the skull. He does not scream; well, you think to yourself, screaming is rather hard with a bullet embedded in your brain.
Still, he sees you clench your finger before you make it. He pulls up his gun as you pull the trigger, launching a bullet as yours strikes home. You scream in pain; it punctured your right leg, denting the bone.
This, by far, is not the worst of your problems. You hear knocks from the downstairs door.