The trailer for the 2008 horror film The Happening effectively promotes the film and targets its intended audience. It establishes the genre as thriller/horror through suspenseful shots without revealing the unexplained disaster. A variety of characters meant to appeal to ages 18-30 are shown reacting to the event without understanding its scope or cause. M. Night Shyamalan's previous successes in similar genres build confidence in the film. Close-ups of characters' scared reactions heighten the drama without explaining the threat. The trailer promises revelation of unknown forces at work to compel viewers to watch the film.