Something else, slightly unrelated, but there are people in the world who can imagine inside their own head, can visualise things, can see with the minds eye, and there are people who cannot! Ask them to think of an apple and yes, they think of one but they cannot imagine the actual picture in their head. Turns out some of these people are just as surprised to find out freaks like me can see pictures in their own head! Ha! The brain is a strange thing.