I've seen the video, and read a couple of supposed origins of it. I thought that it was computer generated, as it looked too perfect to be "natural" and thus subject to all the variables inherent in sending balls throught the air etc. Irrespective, someone has put a lot of effort into it, and certainly has more abilities in that area than I do. Alan MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.