There are a few videos, uploaded from many different events on YouTube. 

For those looking to be "entertained", here's one to start with - http://www.youtube.com/watch?v=MbNnw5P5l4M - - - surf around You Tube and let us know what you may find

If you're looking for a DEMO go to You Tube - - http://www.youtube.com/watch?v=PxWy3HfUrrg