Of fact, a knee kick can be successful if thrown correctly, at the right moment, and with the right distance. Many MMA fighters may throw a left-right combo followed by a leg kick to the opponent's front leg. This technique is called a "bulldog punch" and it is very effective because it connects on target (the leg) and puts great stress on the opponent's leg. The most common mistake made when throwing a leg kick is that the foot isn't lifted high enough into the air. If the kicking foot is held flat on the ground, it will not produce the desired effect. The heel should be raised so that the toes point forward, creating a slightly bent position for the foot. Only then will the leg kick have maximum penetration and damage potential. Another common error is that the kicker waits until after he or she has thrown the kick to try and find out if it landed. It is important to look down at your feet during a fight to see where you are kicking - this allows you to adjust your attack accordingly. For example, if you see that your kick did not connect, you can change direction or add follow-up attacks before the opponent knows what hit him or her. Finally, keep in mind that while a single leg kick can cause serious injury, they are rarely the finishing move of choice for modern fighters.