- The Insidious trailer uses fast pacing and syncopated cuts to build tension and anticipation. Shots are carefully composed to convey meaning through camera angles, movements, and lighting.
- The trailer establishes that the family is being haunted by supernatural forces in their new home. Unnatural shadows, sounds, and movements suggest the house itself is the antagonist, watching and causing distress.
- Scenes of the distressed mother and investigations by experts introduce the plot and characters while continuing to highlight the growing terror of the haunting. Jump scares and ominous close-ups keep the audience unsettled and on edge.