Push hands and Da shou skills vs real people trying to knock your head off.
Been studying Tai chi for 25 years now, with teachers from the lineages of Cheng man-ching, Fu Zhongwen, Jiang Yu-Keung Xiang Yang-He, Yang Zhenjie, Yang Zhendou, and Yang Jun along the way.
https://youtu.be/E9wL-mc8PmU
and
https://youtu.be/M88AM_6x1Lw