creature, SCP-939, quadrupedal, red eyes, sharp teeth, reptilian skin texture, lunging pose, aggressive stance, containment breach, dimly lit corridor, concrete structure, emergency lights, foggy atmosphere, horror theme, detailed shadows, high contrast lighting, 3/4 view, dynamic angle, science fiction, amorphous material, dripping saliva, tense muscles, metallic surface reflections, secure facility, ominous vibe, cinematic composition.