Kidding

A man in a dark environment raises his arms in a defensive posture, then appears in a warehouse holding a gun, followed by a scene of him being pushed against a wall, then fighting a woman in a dimly lit space, then pointing at a horde of zombies in a narrow alley, and finally working with another person on a rooftop. The sequence takes place in a post-apocalyptic setting with multiple locations including a dark interior, a warehouse, a building with corrugated metal walls, a smoky room, an outdoor alley, and a rooftop.