That is not Sigourney Weaver. And that is Sigourney Weaver. So what exactly is happening here? Turns out a fan of 'Aliens' (a really, really, really big fan) decided to create a hyper real silicone replica of Sigourney Weaver's head to "celebrate the feeling of nostalgia and evoke the memories of an era gone by." We're not sure exactly what that means but we do know this: creepy.