The Morlocks in the film also have a system for summoning the Eloi into their sphinx by using air raid sirens. Supposedly, this was originally used to warn of bombing. Responding to the siren has become inborn, and the Eloi now do so like cattle. The Morlocks use whips to herd them.he Morlocks in the film also have a system for summoning the Eloi into their sphinx by using air raid sirens. Supposedly, this was originally used to warn of bombing. Responding to the siren has become inborn, and the Eloi now do so like cattle. The Morlocks use whips to herd them.