when the title 'underworld' came up the screen a noise of something zooming pass by synchronized with each other. one of the conventions in the thriller film is that the camera is always moving even in the shots where we suspect it to be still its still moving for example if the are going to show some one's body they might start the shot with that person's feet moving the camera upwards and ending the shot on the face. this kinds of build tension in the audience. one other convention of the film is a narrator which tells the story most likely to be the protagonist and this opening sequence does just that. the costume of the characters we are following are all dark colored clothing a convention of thriller genre. the location in the opening sequence is a subway showing realism as all of the thriller films have realistic location
this a part of generic conventions.
