aliens 4

A large, dark, multi-limbed creature swims through a flooded, debris-strewn interior with greenish lighting, while two figures in dark clothing swim underwater in pursuit. The scene shifts to a close-up of a mechanical component, then to a large, damaged mechanical structure, followed by a wide shot of the two figures swimming through a turbulent, water-filled corridor, and finally to a view down a long, dark, illuminated corridor.