Ghostly goings on

Whether or not you believe in ghosts, I would like you to look at something and give me your opinion.

I have always been interested in what is called 'paranormal'; I remain sceptical, but think there are things that cannot always be explained. This may simply be becuase we do not fully understand them, as I once heart Yvette Fielding say on an interview about Most Haunted 'years ago people used to think lightening was some kind of magic, that was just because they didn't understand it, science has moved on and now we do understand it we know it's not magic. Ghosts may be scary because we don't yet understand them, there may be fully rational explanations that we have not yet discovered'

Still I find the whole concept fascinating. Mike has given up all hope on me, and thinks he's lost me to some dark side, as he keeps saying 'you're going all weird on me', eh, and he thought he knew me after 2 1/2 years!!! Muhhahahaha.
Still...he hasn't left...yet...so I think he may tolerate my interest with scepticism and occasional outbursts of 'are you fucking crazy, there is nothing there'. Ah, now what he is referring to in that sentence, was my lastest interest. Ghostcams.
Yes, laugh away if you will, but I find it fascinating, webcams/video set up to record any paranormal activity.
Now, don't get me wrong, I'm not toally falling for every tiny thing that looks like it might be a ghost, I am, as I say, sceptical myself. There is one webcam which is not the best quality especially at night, it is very easy to think shift in light is something moving.

The best webcam I have found, and ok, gotten slightly addicted to watching I'll admit, is the Willard Library ghostcam. I never actually think i'm ever going to see anything, I'll be honest. So many pictures that have been submitted by others make me think 'I can't see anything!!!!' and sometimes I'm convinced people are hallucinating. So watching halfheartedly the other day whilst listening to the Dropkick Murphey's CD mike bought me, I suddenly froze. I captured the image. It suddenly appeared, probably because the webcams update every few seconds so there is a time delay, that's not the weird bit. Take a look mine is the last picture on the page under 'alleycat' (can't get it to upload so use the hyperlink)

It looks like a person, sure, that was what my first reaction was, it's a person on the stairs. Why is it black? Totally and utterly? I've seen people going up and down those stairs on the cam before, they aren't all silhouetted, they have colour, and depth, another thing this lacks. No depth to the colour. It isn't blurred, so it's not caught the motion of whatever it is, it's a very clear outline. You can see legs, arm, body, possible cape. Why is the head so small in proportion as well? That's another thing I don't understand.
So, laugh away, but in all honesty, I'd like you to feedback on this picture, because I'd like to know views. The things above are the things that I don't understand about it, so I'm throwing it open to discussion and rational explanations from you guys.

Cheers.