Shock Waves isolates its travelers near a deserted resort and introduces underwater Nazi zombies whose silence is part of their menace. Their dark goggles and measured movement turn them into an impersonal force rather than a collection of expressive monsters. Water conceals both approach and numbers, making a clear horizon no guarantee of safety. Watch how the film uses stillness and the edge of the frame; a slow emergence can be more disturbing than an immediate chase when the surrounding landscape offers no dependable refuge.