I may have read about this. I think it's called DEPERSONALISATION or DEREALISATION.
From One Website:
Derealisation
A feeling that you and/or your surroundings are not real
And/or experience your surroundings through a diffused light, fog or mist
Depersonalisation
Feeling as if you are "outside of your body"/ 'detached from your body', as though you are either standing alongside, above or behind it
Other dissociative sensations
Sensitivity to light and sound
Tunnel vision
Feeling as if your body has expanded so that it feels larger than normal
Feeling as if your body has shrunk to minute proportions
Stationary objects may appear to move
Driving a car and suddenly realise you don't remember what has happened during all or part of the trip
Listening to someone talk and realise you did not hear part or all of what was said
Sometimes sit staring off into space, and not being aware of the passage of time
From another Website:
This feeling can last for hours and is called depersonalisation. It can be quite difficult to describe what this feels like. You may feel a fuzzy-headed, spaced-out sort of sensation. You know that you are fully awake yet you feel distanced from things. You feel like you are a robot acting on automatic. You may seem like being an observer looking at everything from a distance. Also, things around you may not seem completely real - so called derealisation. These feelings can be very disturbing. Depersonalisation and derealisation often suddenly start, and just as suddenly stop.
From a third website:
Another possible way to describe the actual physical manifestation of the feeling is to compare the very popular film technique called a Vertigo shot or Dolly Zoom. In this technique, the subject of the picture stays fixed on the shot while all the surrounding background is pulled away - providing a sense of vertigo or detachment.
Dunno if this is it or not...xxx