The document analyzes seven film trailers for possession horror movies to understand how to effectively promote a possession horror film trailer. All seven trailers featured typical conventions like glimpses of the narrative, music, and horrific imagery. Specifically, they all showed normal family life disrupted by terror, without revealing the full resolution. They used fast cuts between shots to build tension without revealing too much of the story. Elements like dark colors, religious props, isolated settings, and manipulated sounds and speech were used to create an atmosphere of fear. Analyzing these common techniques will help in creating a successful trailer that attracts audiences through tension and mystery.