If you call yourself a card magician, then you have to know this force. It will require a LOT of
practice, and even then, it won't work 100% of the time. However, this will be your workhorse of
forces. If you are unable to force it, then just go into a different card trick. I can't stress
enough the importance of knowing this force. Oz does a good job at teaching the basics. If you
want something a little more detailed, then you may want to get the Classic Force by Paul Green.