I did that when I was probably about eight, and yeah, something happened, i'm not sure what though. There were about three or four other people with me, we saw something, and it still kinda gives me chills, then we all ran off screaming, out of the room, out of the house, out of the yard, across the street, scattered all different places.
I think what I saw wasn't really a bloodied up woman, but it was roughly the shape of a face, kinda distorted, fleshtoned and not all ghostly white or anything, solid black eyes, black hair kinda nappy looking. the whole thing looked like a bad photograph that had been scanned and distorted all to hell shapewise. yeah creepy.