Thriller openings - Memento

In Memento you have a photo being shaked and then it disappears. This confuses the audience as events are told backwards 10 minutes. There are close up shots of blood running backwards on the wall and an empty shell from a gun, glasses and a dead guy on the floor. This creates suspense to the audience because they don't know what has happened and will be eager to get the story therefore, carrying on watching the film.The music is very eerie, and frightens the audience, also, since it's going backwards, the music ends with a ticking of a clock, emphasizing what happened before the man was killed.