Here's some reality horror...
And here's how it's done... simple but highly effective.
(On topic - to me Alien 1 was pretty shocking - probably the only movie I've seen where I kept watching at the clock every 5 minutes, couldn't stand the suspense and believe that this movie was still to run for another 40, 35, 30 etc minutes. Utter suspense, can't be topped. Plus, close to no splatter but what a movie! I also liked the ending of Alien 2/Aliens a lot.)