I had worked out how this must be done from the trailer, so partly I was paying to prove myself
correct. It was however useful to learn the various ways the manoeuvre can be used and Abdullah
gives some useful ideas. For example I would not have thought of using it for multiple peeks, yet it
proves very practical.
For $10 it is a useful and really easy-to-do addition to your arsenal,
and worth your time playing about with and seeing what you can develop.