After noticing the anomaly in the mirror, Qin Tiantian's heart raced. The camera work here was evocative, as if she were the one in the elevator, realizing that the person riding with her cast no shadow.
It was different from directly scaring the viewer; instead, it allowed the audience to discover the eeriness on their own, creating a stronger sense of immersion.
Moreover, the nurse who might have been a ghost didn't suddenly turn her head to frighten someone; she remained as she was. In this slowly ascending elevator, the seemingly calm but actually turbulent environment heightened the sense of urgency, worry, and fear.
It was like being beheaded in a market—close your eyes, the knife falls, and the head rolls off, ending everything in an instant, possibly without even feeling anything.