Have a look here
http://www.youtube.com/watch?v=GKN2MdELQVc
I wouldn't recommend watching it all, it'll spoil it for you, should you decide to watch it in the Park but you'll get the gist of the show.
We really enjoy it, there are some special effects that obviously you don't get from watching it on PC.
On one of our trips George sat next to my brother-in-law, he thought he was just some really odd guy as he asked if the seat was taken when there were rows and rows of empty seats all around us.