Yarn Winding center pull without a winder

I would like to share with all a link for winding center pull yarn without a winder

http://www.ariadneknits.com/blog/?p=62_

It shows how to do it with your thumb and it is so easy, that, although I have my nice winder, I have started doing it for small balls and it works for me. Sometimes you are in a hurry, and it is fun doing it