It seems straight forward to interpret (which means I'm probably wrong.) Since the motions are impossible they didn't happen. Either:
1) The objects were much closer and the high speed motions were apparent motions; or
2) The instruments were being spoofed by:
A) DARPA experiments;
B) The Chinese;
C) The Russians; or
D) Some other party (Israelis or ?
I thought the general consensus was that the way that the craft was accelerating far outpaced any known tech by a large margin. I was hoping some aeronautics HNers could chime in with their 2 cents.
(I know there were more, but can’t find them atm.)