In this week's mini-episode, we discuss the concept of the knee line: an imaginary line connecting your two knees. When the two points of this line combine with your groin, these three points create a triangle. That triangle is the basis for how we use our legs to clamp or wedge our opponent in place. To clamp or wedge their body part in place with your knees, it should be inside your knee+knee+groin triangle. To prevent them from doing the same to you, your body part should be outside their...