The document discusses conventions of psychological horror films and provides an example for a teaser trailer idea focusing on school bullying. Key elements of psychological horror include isolated everyday settings, vulnerable main characters, normal clothing and props, dim lighting and eerie music. An example film referenced is "The Woman in Black". The proposed teaser trailer would focus on a boy who "snaps" after constant ridicule, capturing a popular girl at school in a dark room to create tension and intrigue for the target teen audience. Inspiration would also be drawn from the low-budget film "Buried" for its use of lighting, atmosphere and sound.