The document discusses the development of ideas for a short film from an initially apocalyptic zombie idea to a psychological thriller. Key influences included films like Memento and Inception for the thriller genre. Locations were limited to the protagonist's flat and Hampstead Heath to focus on story and character. Costumes were plain for the protagonist to not distract from his mental state. The soundtrack was inspired by horror films and used electronic tones. Editing techniques like changing speeds showed the protagonist's unstable mind.