Alternative vision

http://www.youtube.com/watch?v=vXKgq...eature=related
http://www.youtube.com/watch?v=vXKgq...eature=related

People able to see even though they're blind all their life? Pretty amazing.
Have you ever experienced being able to see your surroundings even though you had your eyes closed? It happened to me few times, while lying down and being completely relaxed, however, it lasted only for few seconds, because as soon as I realised 'hey, I can see even though my eyes are closed' this vision disappeared.