Something like 'Psycho,' which is this psychological thing that slowly, slowly, slowly builds, and actually it's a much more powerful reaction you have when it assumes that you're intelligent as you're watching it. I want them to make me believe that whatever's happening could really happen, and then it becomes much more frightening.
As with all types of writing, fantastical fiction depends on the same basic rules.
It seems so easy to write about some normal event and twist it a little bit to make it into a supernatural event.
It's such a complicated thing to put a movie together. The book world is so much simpler.
Make your characters believable, and your reader will believe what they believe.