I've yet to hear, see, or read an adequate ( and certainly not personally satisfying ) explanation of " back and to the left " by an official from any level of government whilst in their official capacity...nor in any mainstream artistic or journalistic medium whatsoever. I'm new to debunking but that seems to be the most glaring visual evidence that can be used in an adult argument or debate on this particular topic, which is certainly the watershed moment of the proletariat mistrust of the average American citizen towards their government. Is that not so?
Gunshot wounds in real life do not conform to what Hollywood suggests they uniformly do. I have a gunshot wound to my chest, which was stopped by body armour, but certainly did not make me fly through the air as a similar Hollywood shooting would suggest and I felt like I had been hit with a hammer and fell over. I would also opine from seeing a few other people getting shot, that each one is an individual event, so predicting what 'should' have happened and what it 'should' look like is a bit unscientific.
Here at about 1:40 you see a guy shot at close range with presumably a 7.62x39mm AK round which also appears to pass right through him. He does not fly backwards.
This chap gets shot multiple times at close range by rifles - does not fly back
Head shot, presumably by a sniper rifle, head does not fly in any particular direction.
Syrian dude, shot in head, drops straight down.
I am not a big fan of using youtube videos as 'proof' of anything, but I am trying to make the point that gunshot victims do not always do what you 'expect' them to do and simply saying that 'back and to the left' is evidence that JFK was shot from the front is the same as me saying that the last video is evidence of a Syrian dude being shot directly from above.