Besides tapping into our instinctive fears. night scenes lend themselves to the chiaroscuro lighting-the use of deep gradations of light and shadow within an image-that most horror- movie cinematography depends upon. This Lighting style emphasizes stark contrasts, with large areas of deep shadow accented with bright highlights. The light is often direct or undiffused, which creates well-defined shadows and silhouettes, and low-key, meaning the dense shadows are not abated by additional "fill" lights. Horror-genre lighting is sometimes cast from below, an angle of illumination not typical of our everyday experience. The result is the distorted facial features and looming cast shadows known on film sets as "Halloween lighting.” Viewer's perceptions are often made still more disorienting with the use of canted camera angles that tilt the onscreen world off balance. Horror-film staging also exploits the use of off-screen action and sound that suggests the presence of peril but denies the audience the relative reassurance of actually keeping an eye on the antagonist.