Begin in a side on stance, feet two shoulder widths apart, with the kicking leg back. Feet should be parallel, pointing slightly to the side. Keep the guard up throughout.
Drive the rear leg forwards. Keep the body upright, with your weight transferred to the standing foot for balance. Keep the knees close together as you bring the kicking leg through.
The Knee comes up and the standing foot pivots 180 degrees to the outside so that the heel is now facing the target. This naturally causes the hips, shoulders and body to flip across.
Straighten the leg by extending the hip and knee. Throw the hips forward for increased reach and power, and to create a whole body movement. The contact point is the instep of the foot.
After you hit the target, immediately snap the leg back in. This is to stop the opponent catching the leg, to speed up the finishing phase neatly, and to prevent over swinging.
Set the kicking foot down landing forwards as you complete the kick. From here you can either perform additional moves, or return to the starting position.