Psychological thrillers commonly use certain conventions in their mise-en-scene, sound, and camera work/editing to build tension and suspense. Settings are often in cities or confined indoor spaces like houses or offices to limit characters. Costuming typically features the antagonist in dark, smart clothes while the protagonist wears brighter colors. Low lighting, mirrors as props, and non-diegetic high tension music or silence are employed. Quick editing, mid shots and close ups are used to show characters' emotions and relate tension. Flashbacks provide backstory while fast pacing keeps audiences on edge.