dodgy camera cuts http://www.joe.co.uk/sport/did-you-spot-the-mysterious-stadium-of-light-ghost-on-mnf/85620 tho a google search also revealed this:
Pretty sure it's a glitch in the recognition software in modern digital cameras. The other people in the picture didn't bat an eyelid. Probably because he never actually disappeared. Quirky story though, but I bet the same bloke is working at the AOL today repairing the turf there.
I' almost sure it is just a glitch with the camera, but I do like the reaction this sort of thing stirs up..
But whilst we like the idea of a ghostly groundsman haunting The Stadium Of Light, we're pretty sure we've solved the whole mystery. On the screens behind Jamie Carragher and Phil Neville, the images we see are likely to be stock footage of the ground played on a loop. This means that Adrian Partridge, the club's head groundsman, would've been caught in the footage before the loop starts again and he 'disappears'.
The Sunderland defence disappeared as well ! there is some great ghost/poltageist videos on you tube. The Manchester office building poltergeist is the best I have ever seen, it is 100% genuine, and you would not get me any where near that place. The two Russian blokes talking and from nowhere a bloke on a bike appears !.