If you go to that YouTube page, you'll see that this sort of thing has been happening with increasing frequency since 2007 in many more places than I'd first imagined. the most recent incident was in Arizona.
1. While sitting at your desk, lift your right foot off the floor and make clockwise circles.
2. Now, while doing this, draw the number "6" in the air with your right hand.
3. Your foot will change direction.