The media buried it...well nowadays we know the media can be liars, so that information you referred to has to somewhere...the media is a second hand, corrupted organ.
I would guess that watching the unedited Zapruder film would show multiple impact events(recoils). I confess, I have seen video recreations of the film, but not the actual film, frame by frame.
Somebody needs to get to work.
Freegards
Start at 4:00.
https://www.youtube.com/watch?v=c8NBSjRJpkk&t=306s
There always were questions about why the skull pieces landed on the trunk. The Warren commission tried to explain it away.