https://assassinationresearch.com/zfilm/z295.jpg

JBC is not lying in his wife's lap at Z-295.
Please review the Z-frames available here:
https://assassinationresearch.com/zfilm/

It's you who needs to review the Z-film.
Here's a very interesting version of it created by a guy named Ant Davison.
View it full screen and slowed down.
After being shot JBC turns to look at JFK over his right shoulder and then 'swoons' backwards into Nellie's lap as he looks skyward, just before the headshot.
By z295 he is 100% in this position.
Your assertion, that he is shot while in this position, is something the looniest Tinfoil Nutter would be proud of.
Maybe it's your belief that Nellie shot him in the back.
Doubtless you will continue to deny what is plain to the eye. This seems to be a tried and trusted technique.
Each to their own I suppose.