I have never seen the movie “Aliens”, but the term of “eye of newt” is spoken by a witch, one of the Three Weird Sisters, in Shakespeare’s “Macbeth”. They are preparing a potion for a spell:
Eye of newt, and toe of frog,
Wool of bat, and tongue of dog,
Adder’s fork, and blind-worm’s sting,
Lizard’s leg, and howlet’s wing,
For a charm of powerful trouble,
Like a hell-broth boil and bubble.