There are many ways of doing self defense. Tae Kwon Do was famous as kicks. However, students are also required to know "Release", which is the self defense from Hopkido. Therefore, students would know the way to defense the grabbing by opponent. There are 16 release for white belt to green belt. After the student become higher belt rank, there are 7 "Self defenses" for green blue stripe belt to blue red strip belt. Self defense includes many ways to defense different kinds of attacking. "Knife Sparring" is the technique only for red belt up students. Learn the way to defense an opponent with a weapen is the final step of learning self defense. However, self defense technique is very broad, there is always something new to learn. Do not stop learning after learning all the knife sparring.