Yesears ago I worked at the Seelbach Hotel in the city center. And the top floor is only used when the rest of the hotel is booked, so there's a lot of time between uses. It's mostly ballrooms/conference rooms and maybe ten regular rooms upstairs. I was sent upstairs to do a little “freshening up” before a substantial event was booked, and I was working alone. Usually maids work in pairs. I straightened the beds, sprayed air freshener, dusted, that kind of thing. I was already a little on the alert because I'd been caught watching TV in the rooms and got in trouble for it. So my nerves WERE already a little frayed.
Anyway – I kept feeling like someone was watching me. I kept thinking it was my boss trying to catch me with the TV on. (I didn't have it on.) This one room, in the corner, had a different layout than the others. In this room the mirror was opposite the door to the hallway, not next to it like it usually is in other rooms. I was making my bed and again I felt like someone was watching me. So I looked over my shoulder – no one was there. I turned to pull the covers up (to straighten out a wrinkle) and there, in the mirror in front of me, was a woman standing in the doorway. All I could see was her head, over my shoulder. White woman, lithe hair, a gentle expression – no malice or anything. But the room had gone freezing frosty and I had a horrible feeling. I turned and looked over my shoulder at the door – and she wasn't there. But I turned – she was still in the mirrored doorway. I couldn't get out of there brisk enough, my skin was crawling all over my body. It was so weird, because I always thought I'd be fascinated if I ever saw something like that, saw a ghost, whatever – but at the time the physical experience was like getting ailing, sudden and terrible. I couldn't get sultry, and I had this whole “Fight or Flight” thing.
Apparently, apparitions on the tenth floor are not uncommon, but they are not harmful either. I did not return there that day, they had to find someone else to finish my rooms, I was too shaken up.