5. Alien
This movie has terrified many, many people and it isnt hard to see why, considering some of the creatures that appear in it. Designed by visionary artist H.R. Giger, the alien itself is very creepy-looking (its hard to believe that for most of its scenes it is just a very tall guy in a latex suit) and not something I would want to meet alone in a dark alley one night. As with Star Wars the scenes that show spacecraft traveling through space are magnificent and as a child I thought that they really were in outer space. The little facehugger alien is as effective as it is nasty-looking and the scene where it is introduced to the audience (and to poor Kane) never ceases to make me jump when I see it (and I am a hardcore horror guy). The money shot so to speak, though is the whole dinner scene that involves a little creature known as a chestburster. I wont spoil it for you if you havent seen it but lets just say that the effects created for this scene are beyond amazing and just wouldnt be nearly as effective if they were done with CGI.