Research on opening of movies, Genre:thriller

THE BOURNE ULTIMATUM- The scene starts of with very fast paced music while Jason Bourne is running away for the Russian police.The music then gets faster and the volume increases when Jason jumps on to a train to create a diversion, he then jumps of it and runs and breaks into a medical store. The volume of the music decreases but the pace of it increases as he is trying to find the medicine he needs to relieve the pain of his flesh wound. Because the pace of the music is so fast, this tells the audience that he is against the clock. Next, the music suddenly stops because he has injected himself, and two Russian police officers run into the medical store and yell "put your hands up". The music is still silent because Jason complies, but after a few seconds it kicks in again very loudly because Jason knocks out the two officers.