Here is one oddity that you can mention. Most people have two and they can move but they can not see them move. But other people can see them move. (Even if you look in a mirror you can see them but the very moment you move your eyes you can't see them in the mirror so therefore you dont see them move. Of course if you are in a movie then you can see them move in a movie but that is the only way.
Hopefully someone else will contribute.