The document discusses conventions that are commonly found in thriller films. It uses the film Shutter Island as an example to illustrate several key conventions: 1) Thrillers center around crime and murder; 2) They often involve themes of mistaken identity or amnesia that are revealed later; 3) Ordinary situations are made suspenseful through the use of film techniques like lighting, camera angles, and editing. Overall, the document analyzes how Shutter Island effectively employs various cinematic techniques and plot devices to thrill audiences.