Released in 1960, Alfred Hitchcock's Psycho was one of the first films of its kind. Up until this point, audiences had never seen a film quite so brutal. Psycho's release marked the beginning of a whole new film genre: the horror movie - and with it came the first scenes of true brutality to be shown on film, which have since influenced numerous movies, including the likes of Scream and Halloween. Although the shower murder scene itself lasts only 45 seconds, the suspense that Hitchcock builds up in the scenes and moments before the murder are what imbues it with a special and entirely terrifying quality, leaving the viewer with that nagging feeling of fear every time they pull the shower curtain across the rail. It can be said with certainty that the rest of the objects and situations on this list have been influenced by Hitchcock's clever ability to turn something as mundane as a nice, quiet shower into a fear that we will never quite get over.