Since there's very little anyone can really tell from just a page or two, especially if they're the very first few pages, what can we comment? Well, its nice of you to share at least. Even if it is only to whet our appetite for more. Oh yes, I'm on to you.
Personally though, I wouldn't opt for this kind of a beginning. I'm also not much for horror, so that might color my judgment. I'd build up a little bit of reference, ease the reader into my world and crank up the tension nearing the end of the prologue. Can't blame you for rocking the boat from the very start, that's one way to start and seems pretty logical if you're going for what I think you're going. I think even if I was into the genre I'd prefer to introduce the subject with something seemingly innocent and then leave a twist at the end.
I think I'd add the journey of the woman going towards the room, when everything was perfectly alright/normal and then use the macabre sight as the real precedent of the story to come. Of course, that's just me and how I prefer to write. Perhaps I feel it puts the horrid scene into even a starker perspective. But since I'm not much for being very descriptive that's more or less the only way I feel comfortable doing it. You can obviously do fine with a vivid enough use of words, and that seems to be more your approach in this instance.
Of course what you write, when you write it and how determines and is determined by the flow of your story. Even if you thought I had a point, however unlikely, I doubt you would or should change anything. I can only hope my perspective has been of some use to you.
Oh, Lord. Why does the robot have a mustache?
I grew it with my human lip.
Is... Is that a fact?
Oh yes, I love to grow hair all over my body in between acts of defecation.
Well, he sounds human.