Thriller films aim to keep audiences on the edge of their seats through anticipation and suspense. Low-key lighting, shadows, mirrors, and flashbacks are used to build tension, mystery, and guide audience attention. Sound effects and diegetic/non-diegetic sounds add atmosphere and meaning. Black and white can set time periods and accentuate dark, eerie tones through shadows and suspense. These techniques reveal character traits, create uncertainty, and intrigue audiences to satisfy their curiosity.