Wreck Penetration Battle — Sunken Freighter Fight

Claustrophobic underwater action short, 10 seconds, 16:9, submerged horror-action realism. Inside the engine room of a sunken freighter: total darkness except for diving lamps, ancient silt hanging in the water like falling snow, a collapsed catwalk twisted overhead, and far above, one porthole glowing sickly green.
0-3s: A salvage diver in a battered drysuit kicks through the doorway clutching a recovered strongbox to his chest, his flashlight beam stabbing through the silt, rusted machinery looming on both sides. 3-7s: A rival diver drops from the catwalk wreckage and the fight erupts in silence: a pry bar swung in slow water, the beam-lamps slashing across the dark, the strongbox torn from one grip to another as both divers grapple and a vast cloud of silt explodes around them, swallowing all visibility. 7-10s: In the churning murk the beams strobe wildly, a gloved hand closes on the strongbox handle, and the frame whites out in silt as both figures vanish into the cloud.
Subject and wardrobe: two divers in scuffed black drysuits, cracked full-face masks, chest-mounted lamps, one carrying a barnacled iron strongbox, the other a steel pry bar. Props: the strongbox, pry bar, collapsed catwalk, engine-room pipework, the distant green porthole. Camera: disorienting close underwater handheld, whip-pans following the lamp beams, a slow-motion beat as the silt detonates. Lighting: hard white flashlight beams, the green porthole glow far above, every particle backlit in the beams. Atmosphere: terrifying, blind, primal. Style: submerged horror-action, 35mm, silt volumetrics, green-black grade, heavy grain, 24fps.