Thriller Opening Sequences (Black Swan)

Black Swan:
The opening of Black Swan shows that it is a Thriller, i know this because there was a use of editing, lightening and and sound.
The editing used such as fade, dimmer, sudden cuts and animation, creates a spooky and mind chilling opening because it is showing opposites to what you would normally notice, for example when the animated swan appeared the mirrored appearance was a black swan to what a normal swan white would look like.
The lightening used consists of light and dark, this helps with the micro and macro elements, for example when the swan leaves the and moves on the lightening changes to a fast dark scene. then black feathers float down onto the screen to show that it is still about a black swan.
Black swan The sound (music) used withing the short clip started with slow low tempo beats with strings used, because it's building up suspense towards a fast hard drum beat, this would appeal towards to audience because its creating a image within the audiences mind to what the movie maybe suggesting to what type of thriller storyline it would be.
I conclude that this opening sequence is effective because it helps build a storyline for the audience because of all these elements.