Suspense

The director of the film Psycho is Alfred Hitchcock and the autor of the novel is Robert Bloch, in the horror films the characters are the victim or the victims, the murderer that causes the murders, and the witnesses, they watchs sometimes the murder. The technic they use at the camera is the fast scennes and a lot of action when the scen pass. They normally change between two frames (murederer and victim) very fast for making you feel scared. Psycho is a good example in the shower scene when the murderer and the victim are alterned in the frames.