The three girls seem happy and excited which is a contrast of what you would expect in a horror film.
Seeing the back of the HOODED MAN'S head is to keep him mysterious. Then tracking around him is to give a little away about the man, but not revealing to much. Also showing the evil expression printed across his face gives an idea about what he is like, and is going to do.
The superimposed image is to show a past event which has taken place in the flat and sets up an idea of what may happen in the future. Also gives a contrast with the other light hearted scenes, and is unexpected to the audience.
The scene with the OLD LADY is there to frighten the audience, as well as LAURA, as you get a clear sense that something terrible has happened in the flat before hand with the OLD LADY'S reaction, and the shot reverse shot helps to intensify the conversation.
We then see another superimposed image which enforces the first superimposed image and the OLD LADY'S reaction, to create more suspense and wonder.
When KATHERINE and MICHELLE notice the man staring at them we get a clear sense they are going to be the HOODED MAN'S next victims, and that he isn't afraid of being noticed and creeping them out before hand.
The build up to the scene with LAURA entering the empty flat is meant to be that the audience expect the other girls to have been taken already, and gives an obvious appeal of what has happened to them. The hyperbolic door bell sound links with this as you expect it to be the HOODED MAN, and creates a tense atmosphere.
However this is contradicted in the last scene with the KATHERINE and MICHELLE being at the door as it is unexpected, and allows the audience to breathe and return to the light hearted tone implicated at the beginning of the opening sequence.
We have chosen to fade to a black screen when introducing the credits as they slow the pace and intensify of the play, as well as creating more of a suspense. The black screen also helps with passage of time as they move the sequence from scene to scene, and place to place throughout the day. We have also decided to have more action than titles becuse this way is more apparent in our textual analysis of opening sequence from other films in the horror genre, rather than titles over action.
