Robert,
Lending you some support for that part of the film.
Extant z411-417 = 6 frames / 18.3fps = 1/3 second.
Jackie can't land her elbow down to the trunk deck(with her rear end above the seat top) and then slide to where we see her in z, 1/3 second later.(Humanly impossible-challenge offered many times before)
Conveniently, the Nix film ends there.
In the extant z411-417 span, there are four quite obvious blurred??? frames. Your z413 perspective study being in the middle of that morass.