bunker, switch, concrete walls, steel door, dim lighting, underground, military, control panel, wires, pipes, survival gear, camouflage clothing, soldier, standing guard, alert posture, rifle, tactical boots, dusty environment, emergency lights, red button, high security, close-up on hands flipping switch, intense expression, bunker interior, confined space, dramatic shadows, suspenseful atmosphere, metal textures, rugged, 3/4 view, action scene, high contrast lighting, wide-angle lens.