Devil Trailer

I studied the trailer for 'Devil'.
This trailer includes a few horror conventions.
At the start of the trailer the camera shows us a city, but it's upside down. This creates a sense of unease and makes the viewer feel uncomfortable as it's not natural to see things in such a way.
The trailer contains really soft music which connotes innocence and contradicts the regular kind of music you'd expect to hear in a horror movie.
The intertitles change throughout the trailer, the first type don't really seem to relate to a horror movie - but the second set are red with a different font and are placed over a black background wwhich fits horro conventions.
The trailer often has periods of complete blackness, where we just hear what's going on - i.e.: screaming. This is unusual for a horror trailer as people can lose interest if they're not seeing anything, but this trailer manages to get away with showing quite long pieces of just black.
Towards the end an elevator bell noise is used over fast cuts of lots of action, which creates suspense.