If you reach the tenth floor, you may either choose to get off the elevator or to stay on it. If you choose to get off, and if the woman entered the elevator on the fifth floor, she will ask you, “Where are you going?” Do NOT answer her. Do NOT look at her.
Um, no thanks, knowing me I'd wind up getting myself stuck in that other world. Also at that staircase ritual, why would anyone want to stand on a staircase for 13 hours only to summon a demon who's probably going to kick your ass anyways.
It sounds scary but who would've been the first to try/discover this routine anyway and how can anyone know what the girl does if you disappear if you look at her?