Never liked the method myself, but youtube.com has at least a couple of examples:
https://www.youtube.com/watch?v=VBwIuhUZroI
https://www.youtube.com/watch?v=y4OyDYDnb9o
Never liked the method myself, but youtube.com has at least a couple of examples:
https://www.youtube.com/watch?v=VBwIuhUZroI
https://www.youtube.com/watch?v=y4OyDYDnb9o