Okay just watched a new episode of Ghost Hunters. and they were visiting Waverly Hills (and if you didn't know its close to my hometown)
So two of the investigators where in one of the rooms that had old parts from a swing set and there was a noise. At the same time I saw something behind the woman (forgot her name) she was standing in front of the window. Whatever it was it was outside. So I rewind (I recorded the episode) and looked closer. To me it looked like someone's hand brushing across the window. That creep me out O___o

Then after they did the reviewing the evidence they never mentioned. So now I'm thinking that they haven't notice it, they rule it out, or it was part of a hoax.

Or...it could be a local prankster screwing with the GHs. I've heard a story about a guy from a school who pulled a prank on when the GHs were investigating the Sanatorium.
Yeah I bet thats it. Now that strikes me as hilarious right now XD