The document discusses narrative conventions and structures commonly found in action thriller trailers. Trailers typically start by introducing the main character living a normal life until something bad happens, launching the plot in a non-chronological, fast-paced manner. This climaxes at an enigma that is hinted at but not fully resolved. Flashbacks provide backstory but also leave audiences with questions. Trailers balance revealing enough to engage audiences while restricting details to generate intrigue and enigmas around characters' histories, their goals, and whether they will succeed, in order to entice viewers to watch the full film.