The document discusses conventions used in thriller media products and how the student's media product incorporated conventions subtly. It used a red couch to foreshadow the main character Kathy's death, an isolated house setting to create a sense of being trapped, and showed a dead body early on. This follows conventions of thrillers seen in other works like weapons causing death and dark, isolated settings. The student's approach was to build tension throughout subtly until the end using these familiar conventions.