How Suspense is Built in Film

Over school holidays, i tend to find myself watching quite a few horrors and thrillers. There's something about the atmosphere and the tension created in both of these genre's that i can connect with very deeply. It was only until recently where i began to understand it after stumbling across a few interviews of Alfred Hitchcock where he define's the differences between suspense and mystery. To describe this, he used his famous analogy of the bomb, which is explained in the video below.

 While this is a very  good description of what suspense is, it doesn't describe how this can fit into a film. One scene from the recent film "the conjuring 2" carry's quite a lot of suspense using the pre-requisites of a suspenseful film.

Warning: this is a scary scene. Viewer discretion is advised 

This scene exhibits some elements that are common in suspenseful moments in cinema. Probably the most prolific in this particular sequence is the pacing, lighting and sound track. Suspense normally relies on the scene to be slow, but gradually gain momentum as it carries on. This is exhibited by the shadow walking towards the picture and the placement of the portrait in the background of most of the scene. This gives the audience a focal point of the scene- they know that what is going to happen will be related to that picture. This is aided by the music. Because there is virtually no music, or little sustained notes on the strings or something, it keeps the audiences attention purely on the visuals of the scene rather than overwhelming them.