This lesson teaches you a Shoot the Duck. You will learn how to use the boards to help you get down low and place your free leg in front.
You will see an exercise to practice getting down low while gliding on two feet. Then you can progress to a shoot the duck in a straight line, then once you get that you can try it on a curve.
This position can also be very useful to prepare for a sit spin. If you have a good low controlled shoot the duck you are on your way to a great sit spin.
There are some great demonstrations of shoot the ducks as well.