After mulling over the spinning lady and reading the comments I decided to do a bit of research - not on left brain and right brain thinking, that would be too predictable. What I did do was to copy the gif image onto my desktop and then open it in Adobe Image Ready. Then, I looked at all 34 frames to see if the test was, you know, on the up and up. My family won't be surprised that I did this.
The individual frames do follow a normal progression of a circle. There is no random switching, which brings us to the scary part of this knowledge. Our brains do determine what we see, not by the reality of what is on the screen or page, but through interpretation.
What this really means is that when I have been frustrated because others don't see things my way, they may not be seeing the same thing that I see even if it is in black and white. Perhaps having this knowledge will help me be more understanding. You know, nicer.