Mortal combat

A muscular man in a sleeveless vest and hand wraps stands with his mouth wide open, revealing a dark interior and sharp teeth, as he raises his hands in a dramatic pose; the scene cuts to a dimly lit industrial environment where a man in a tank top is thrown to the ground by a large, biomechanical alien creature, which then looms over him as he scrambles away, before returning to the man with the exaggerated, screaming expression.