The document discusses the thriller genre in film and its conventions. It notes that thrillers create tension, anticipation, and suspense through their fast pacing and use of sound and editing techniques. Common thriller conventions include the use of black and white color schemes, lighting and shadows, and flashbacks. It also discusses several subgenres of thrillers and provides examples of codes and conventions commonly used, such as lighting, shadows, and mirrors to create mystery and suspense. Alfred Hitchcock is highlighted as a famous director known for suspenseful thrillers like Psycho that utilize techniques like unexpected music and hidden identities through shadowy lighting.