Back to the Physics involved. From the video alone, one is shown remarkable accelerations up and down @ the flight deck.
Can one eliminate the possibility that one or the other or both of these pilots were unconscious, and depending on shoulder restraint fit, may have been pummeling the column with body slams that had no relationship to formal input?
We're looking at transits of 70-80 feet in less than one second. Hands on column throughout?
bear