Initial Idea

We have chosen to do a psychological thriller. We have looked at a film called The Room Mate, a film about 2 room mates who become the best of friends, until it is revealed that one isn't quite what she seems, and becomes obsessed with the other.
This trailer uses sound to the best of its ability, with a chime ringing every time another vital thing happens, or a piece of information is given about the film. Half way through the trailer, the obsessive room mates Mother is asking whether or not her daughter has been taking her medication. This is the moment of official realization. It is so effective because from then onwards the audience are sitting on the end of their seats, waiting for a jump. We want to use this in our trailer, and have decided to use the idea of possession in ours.
We want to start our trailer with light hearted, comfortable music, to create a false sense of security, as they have done with this trailer, and then have a turning point.