This will drive you nuts! Make sure you read under the
illusion, too....
This is another example of an amazing illusion!!! The last sentence is so true.
If your eyes follow the movement of the rotating pink dot, you will only see
one color, pink.
However if you stare at the black "+" in the center,
the moving dot turns to green.

Now, concentrate real hard on the black "+" in the center of the picture.
After a short period, all the pink dots will slowly disappear, and you will only
see a green dot rotating.

It's amazing how our brain works. There really is no green dot, and the pink
ones really don't disappear. This should be proof enough, we might not

always
see what we think we see.