Another very basic kick, fairly ubiquitous accross all martial arts, Dee Cha Ki, or back kick, is a mule kick. From offensive or defensive stance, the student should look over his shoulder and behind him while simultaneously lifting the trailing leg and kicking straight back, like a mule. It is important to avoid rotating the hip - the knee should be pointing straight down at the ground. The striking surface is the heel. Always look first! Blind kicks are dangerous, especially in a crowded do jang.