The Movie: 'Alien' (1979)
The Scene: Poor Kane (John Hurt) has had a rough day. Until very recently he's had a horrific spider-lookin' alien parasite stuck to his face -- but things are looking up. Kane's up and around, joking with his shipmates before bedding down for a long trip back to Earth ... and then the coughing starts. At first it's no big deal, but then the poor man is overwhelmed by shocking convulsions, his chest starts to buckle outwards, and then we realize what that horrific spider-lookin' alien parasite was doing on Kane's face: it was laying an egg.
And the terror hasn't even started yet.