Prove he is not moving at all, and has no residual momentum from when he last was.
Watch the video. He moves, kills his relative motion to the side of the orbital module, but then, without moving again, his legs just float right back up. I'd have to make a video of the spacewalk showing a static point to display relative motion, but I have many things to do before I work on that.
Cite them.
As I have said, I have one unnamed expert on my side and one named. Simply because they do not wish to go public does not make them non-existent. Even IF you choose to believe I am lying about that, Qu Zheng, engineer at JPL has expressed doubts about the Chinese spacewalk. I will cite his exact reply when I receive a message from him via email. He is real, as the jpl email I used actually was sent to [EMAIL ADDRESS REMOVED].
In addition, Bruce McCandless was very controlled when doing the untethered walk with the MMU.
His center of mass is the center of rotation for his legs. If, however, you don't want to take Bruce McCandless as an example, I provided a statement that I have pictures of astronauts working on hubble with their bodies straight throughout their EVA. You simply chose to ignore that part of my comment.