Research on the horror genre

I looked at the opening secquence for the film Sorority Row as it is close to the story line we wanted and the killing scene and the regret is what we need to look at. http://www.youtube.com/watch?v=QXhea0Y1pQ8&feature=related It starts off at a party and the opening shot is a shot to show the enviroment, it slowly moves towards the house where they are having a party (which is an unexpected scene for a horror film) it is dark but thats only becasue its at night (a generic convetion for a horror film) and the hous is well lit and loud. There are small titles and the bottom of the screen that come and go which dont destract you to much from the main action as nothing is really happening at that point its just setting the scene. In my opinion the establishing scene is too long and drags a bit so in our film we wont do it for that long. It then goes onto intodce the characters which is just them stood in a room bitching about each other so you get an idea they are not very nice. They are then watching a webcam of someone making out with a girl who they have drugged and she is then sick in his mouth, tence music starts to play to make the scene seem more on edge and it seems like the horror has begun, which is quite quick for a horror film. We then find out she is faking it and its a trick to scare the boy, they all then go out in a bus to a remote clear area in the middle of the woods (the boy still thinks its real however the other girls and the audience know its not) it is still dark and remote which is another convention of horror with very tence quite loud music playing and you know something bad is about to happen.