Thriller clip Deja Vu

There are numerous ways in the film in which the director delivered many scenes of suspense. There is digetic and non digetic sound which adds to the building up of the tension. On 2:30 when the doll is floating in the water you can sense that something bad is going to happen. The tension Is created by a series of casual occurring misleading the audience into thinking that everything is going to be okay, but you can tell by the music that something will happen.Spontaneously at the end of the scene there is a massive explosion which could shock the view as it is not what they would of excepted