I’ve noticed before how the lances are swaying after the war boy’s body flies over the roof. Looking at that last gif, I think they achieved that by Tom Hardy moving the lances himself as the camera pushed in. So even in the midst of this huge CGI effects shot, they’re using practical effects to make the shot that much better.
I respectfully disagree :-) I’d bet money this is shot against a green screen, and the car is stationery but mounted on a special rig that wobbles to simulate the movement and that’s what is shaking Hardy and the props. (I can’t remember what they called it “sim trav” or some such, but John Seale mentions how well it worked for the shoot in his lecture to ACS Victoria a year ago.) Then there’s probably just a line on the lance they want to jerk back for the War Boy. They knew this was going to be part of the most composited section of the movie, so I think they’d make it easy for themselves.