Thrillers are fast-paced films that use suspense, excitement, and anticipation. Directors employ techniques like plot twists and cliffhangers to create suspense. Thrillers usually feature a protagonist going up against an antagonist, such as spies, criminals, or psychotic characters. Iconography like guns, cars, and low lighting help identify the thriller genre. Common thriller themes involve mental illness, crime, terrorism, and relationships gone wrong. Sound and music are used to build tension and heighten suspense.