"Alien" is a sci-fi horror classic, full of numerous nightmare-inducing scenes. From hostile creatures crawling through air vents to Ripley's (Sigourney Weaver) final showdown with the Xenomorph, ...

But for all the movies in the franchise, to date, the very first time characters and audiences witness the birth of a Xenomorph out of a human host is the most horrifying scene. Often referred to as ...