The harpie had Blazer point his gun at his own skull. Not near his temple but near his hippocampus. (I will make sure you will wish you where dead. The bullet when fired will hit your skull and shut down several parts of your brain. Therefore making you mentally unstable or in retrospect retarded.) The harpie fired the bullet. at Blazer's skull while Cody was being inhaled by etrius while he was mixed in with the air.