This document summarizes the development of a film trailer for a post-apocalyptic action film titled "Underneath the Mushroom Cloud". The creator conducted research on action film trailers and their conventions. Main influences included the films "The Road" and "Jurassic World". Specific techniques borrowed include using a single word for intertitles, teasing a secondary threat at the end, and incorporating loud noises between cuts. The created trailer starts with black screens and dialogue contrasted with shocking imagery to set the serious tone and introduce the lost world. It aims to immerse viewers in the action genre through fast pacing and a surprise fight scene.