Horror movies come in all shapes and sizes but more often than not, their objective is to, in some way or other, frighten us. You agree to be spooked going in. But all of us have certain flicks that gave us the willies when we were least expecting it and now some films fans on Reddit have tried to narrow down the list of scariest non-genre titles. In the discussion thread, posited the question "What is a movie that terrifies you but isn’t a horror movie?", kickstarter shadowdra126 admitted their pick would be Tim Burton's alien comedy Mars Attacks. There...