Thriller Idea

This is the idea we've had for our thriller opening so far:
Throughout the opening, we want to have a man who we never see the face of, we watch exactly what he does almost through his eyes, using over the shoulder shots and point of view shots.
So we watch him follow a girl home (in quite a stalker-ish way) until she gets to her house, we see her put her key under the doormatt and go inside. He then watches her through the window and we see her go upstairs to bed. The man then picks up the key from under the mat and lets himself into her house. He creeps his way around her house until he finds her room, where she's asleep. We watch him steal a photo from her room, and then we do a close up of the sleeping girls face, and hear him leave the house and as the door slams we see her eye open. We'd cut this footage up with the titles which will be white on black. The title of the film, which we haven't decided yet, would come up as the womans eye opens. After the main title, we see the man walking cockily away, and then running, and thats when we'd end our secret.

We got the idea of not seeing the face of the 'stalker' from the film 'Marnie' by Alfred Hitchcock, because we really liked the idea of mystery and the way it keeps you interested in whats happening.