The Zapruder film didn't show him raising the gun to his head because it was bloicked by the highway sign. When he comes into range again his arms are in front of his throat having just dropped the gun after accidentially firing a first shot which hit Governor Connely. When the gun landed it blew off part of his head.
Your post is madness. (Loved it... LOL!)
Makes sense, no wonder Jackie tried to jump out of the car, yelling, “He is going to shoot all of us”. It could have been a murder/suicide due to Jackie and Jack fooling around on each other and Jack was too drunk to remember who to shoot first.