That's easily explained. If the car is indeed in neutral, taking your foot off the accelerator would result in a zero (well, idling, say 600-900) tach reading. Pressing the accelerator would result in a higher reading. This of course has no affect on the power to the wheels, exactly the same as if you are stopped and put your car into neutral and do the same.
I understand it's tempting to see a single bit of evidence and want to use it to invalidate an entire narrative, but is it so hard to accept that while editing could have made a situation less dangerous seem more dangerous, the inverse could be true as well? We really have no authoritative source of what happened other than the story put forth. The story may indeed be fabricated or subject to hyperbole in parts, but unless you have a source beyond what's here, you are not qualified to make that assessment from the little evidence presented.
I understand it's tempting to see a single bit of evidence and want to use it to invalidate an entire narrative, but is it so hard to accept that while editing could have made a situation less dangerous seem more dangerous, the inverse could be true as well? We really have no authoritative source of what happened other than the story put forth. The story may indeed be fabricated or subject to hyperbole in parts, but unless you have a source beyond what's here, you are not qualified to make that assessment from the little evidence presented.