Well, not exactly a full blown riot, but my office were all pretty scared by it. That's part of the joy of the internet - get something sick or scary and with one click you can share the joy with countless others.
One can only estimate how many people across London have had an email pop into thir inbox recently with the subject
"Follow the car closely and turn the sound up a touch..."
Check out the classic car one - Kfeeauto.mpg - and the other two in the series here...