The program, Flash, or whatever they used was set to change direction. You can’t look at it and force your mind to make it change direction.
Typical left-brained response;)
That's not a Flash (swf or flv) file, it is a simple animated gif. Doesn't change direction, its an old optical illusion.
Unless the program can read minds, that isn’t true. I can make it appear to change direction pretty reliably, after a little playing.
Optical illusion is right, and a pretty cool one! I’m not as convinced of the whole right brain / left brain analysis part of the story, though.