When a Stranger Calls

Lighting - Low key lighting is used as this is a convention of the thriller genre, it is an example of pathetic fallacy as it creates an atmosphere of gloom and tension. It plays of people's fear of the darkness and the unknown. An example is the opening when the house is dimly lit in contrast to the fairground next door, which foreshadows something bad will happen at the house.

Camerawork - It switches between the two contrasting scenes of the dimly lit house and the brightly lit fairground. 

Music - There is non-diegetic music which is typical of the genre as it is unsettling and increases suspense and tension for the audience. There are screams used which tell the audience someone is in trouble and so they emphasise with the situation and this builds tension for them. The use of a phone call is again playing on the common fear of the unknown for the audience and the characters. 

Setting - The fairground is usually associated with fun and joy, so to set a thriller there is unusual however, the isolation of the place the fairground is suggests suspense, especially at night. Also the character was in the house alone, which at night is scary for many people as it is dark and this is a common fear. This builds tension for the audience. 

Editing - Editing in thrillers is usually quite similar with the start being slower paced, and the pace of editing picks up throughout the film, which builds tension for the audience. However when the editing has mixed pace throughout the film, the audience are unsure about what will happen and builds suspense.