They entered the underground facility searching for answers.

They entered the underground facility searching for answers. Then they discovered something that could become them. Some doors are better left unopened. Made with Seedance 2.5 on Pollo AI Prompt: Cinematic sci-fi horror-action short film set inside a massive abandoned underground research-mining facility, grounded practical-effects aesthetic, photorealistic environments, natural realistic pacing, intense physical performances. Rusted industrial machinery, underground tunnels, mining elevators, emergency generators, thick cables, dusty concrete walls, old observation windows and flickering fluorescent lights. Four researchers wearing rugged exploration gear investigate a recently discovered underground chamber. Natural handheld cinematography, muted industrial color grading, realistic shadows and atmospheric dust. All sound begins completely diegetic — footsteps, breathing, machinery hum, radio static, metal creaks — with a tense cinematic score gradually entering as the danger escalates. [0-1s] Hard cut: a massive steel elevator suddenly stops between floors, throwing the four researchers against the walls as sparks rain from the ceiling. [1-2s] The emergency lights activate.