Research into similar products - similar film trailers

This is the film trailer for the film 'Insidious Chapter 2'. I really like the way this trailer has been constructed as it creates a chilling atmosphere throughout the scene. The use of sound makes it seem more realistic and spooky either though it doesn't technically suit the theme of the trailer as they use a lullaby. The use of the ghostly woman is quite scary and i feel that i can create something pretty similar to scare my audience.