Thrillers use conventions like low lighting, isolated characters, plot twists, and a struggle between good and evil. Film trailers reveal key moments without spoiling the plot, using credits, captions, stars, and voiceovers to attract audiences. Camera techniques like canted angles and close-ups are used to demonstrate changes and emphasize expressions. Editing employs reaction shots and title cards to build suspense, while settings, costumes, and lighting create tension through confined spaces and low light. Sound further increases tension with ambient noise and asynchronous screams.