OMG! I should post a photo of me viewing that screenie through my DELL Laptop with that weird ( in a creative kinda way ) wallpaper! For those who wont get it. I own the same (or may be similar) model of dell laptop that is in the screen shot!
Old trick, have seen it done before, infact I remember it was within the Top 10 pics somewhere, just can't remember where : P. You cant see it that clear in this pic, but it looks like your screen is transparent and you can see through, though its not