for instance, both movies contain shots that create an artificial lighting situation such that a character is lit in the background and walks or runs through dark areas to the foreground, where his arrival triggers, off-screen, a light not on before. the result is so visually dramatic because a character moves, only barely visible, through vast pools of shadow, only to exit the shadow very close to the camera, where his whole face is suddenly completely lit. this use of much more shadow than light, soon one of the main techniques of low-key lighting, heavily influenced film noir.