You might want to check this out. It looks incredibly similar to a couple of versions from this DVD.
http://www.hanklee.org/xcart/product.php?productid=8950&cat=0&page=1
Also, as a suggestion, don't pull them apart so quickly. It currently almost tips the method the fact that they come apart so easily. I think you'll find many laypeople will be able to quickly reverse engineer this. Maybe you could give a couple of shorter tugs to show that the band is truly on there to begin with, then apparently put much more effort into actually pulling them apart?
Joe