Moo Reup Cha Ki, or Knee Kick, is performed from offensive or defensive stance, with either foot. Again, lets examine the trailing leg implementation. The back leg is brought up, similarly to the chambering motion of Ahp Cha Ki, but with the toes pointed straight down. It is often taught with accompanying hand motions - imagine holding an opponent's head between your hands, and bring the knee kick up while pulling the imagined head down, such that they meet with force. After performing the Knee Kick, it is important to return the kicking leg to its original stance.