BaguaZhang leg, knee and foot skills
Xu was incredible at applying leg techniques at any point from any position. He would use the combination of legs, knees and feet to chop a person down and throw them. Here is an excerpt of him demonstrating. Many of the points he strikes are acupoints and when the general area is hit correctly you will find the leg collapse or fly out from under the person as you see here. Learn Yin Bagua Here