Original sentence: Front Kick (앞 차기kick, first the practitioner simultaneously raises the knee and rotates the body 90 degrees, and then quickly extends the leg, striking with the heel or the side of the foot.Reverse Turning Kick (뒤 차기 bandea dollyeo chagi):  Here the practitioner turns the body away from the target and pushes the back leg straight toward the target, hitting it with the heel while watching over the shoulder.Roundhouse Kick Turning Kick or Round Kick (돌려 차기 dollyeo chagi): The practitioner raises the knee, turns the hips, pivots on the non-kicking foot, and snaps the kick horizontally into the target at a 80 to 90-degree angle, either with the instep or with the ball of the foot (in the latter case, with the toes pulled back out of the way as in a front kick).The latter technique requires a great deal of flexiability in the heel
Edited sentence: hitting it with the heel while watching over the shoulder