these pictures are from the opening secen from the film Phyco, this is a clasical scene where is their is a death where the victim is vumrable. you cannot see the villan face of the killer to make it more misterious so the people watching the film wuill find out later in the film who it is. this picture shows a woman screaing from being horrifyed from the person in her room when she is taking a shower.
 

in this seconed picture it shows you that their is a person in the room, you cannot see the face so it will be more of a mistory to the viewers. you can see from the figure who it may be but still unsure as the face is hidden.