The document discusses iconic sounds used in thriller genres. Gunshots are commonly used to signify violence as the loud, sudden noise fits well in action thrillers. Screams are also frequently heard as they indicate that a character is in danger or in pain. Roaring engines convey a sense of power during car or motorcycle chases, which are also common in thrillers. Crashing and smashing sounds enhance violent actions like broken windows or car accidents to create a more intense experience for viewers. Punches may include amplified sound effects for important fights to seem more violent, while smaller fights may be portrayed more realistically without added noises.