1) The opening of the thriller follows conventions of the genre by having the main character be the killer and including a character profile to shock the audience. It also uses blood, gore, and ominous music to create tension.
2) The opening deviates from conventions in some ways, such as by showing a Soviet-style montage and having a younger killer than is typical. It also switches from color to black and white.
3) Elements that were included to make the opening successful as a thriller were not showing the actual murder, having an average person as the killer who doesn't know they committed the crime, and creating suspense around the unknown victim.