The document provides an analysis of the trailer for the film "Insidious". It summarizes key shots and editing techniques used in the trailer to build tension, atmosphere, and reveal plot details. Shots of the family in their new home are intercut with unnatural movements and shadows that connote the supernatural. Close-ups of characters' fearful reactions reveal something is haunting the family. The trailer establishes that the antagonist is the house itself, which seems alive and watching the family.