Do you remember the first time you watched Alien? It was a terrifying experience for myself. The Thing was another movie which pulled my stress cord to the breaking point. Then, there were Sci-Fi (Science Fiction) movies with less horror elements and more action, such as Independence Day. When I experienced Sci-Fi for the first time, I was astonished, but did not give much thought toward the reasoning behind the movies. You do not focus on the logic or realism in a movie, you simply want to enjoy it, let your emotions take over you.