Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

Another weird thing about the Zapruder film is that it shows Kennedy covering his face with his hand. So, he had his head turned towards the spectators on his right, and he was waving. 

 But then, 6 frames later:

After 8 more frames: 

Nobody reported Kennedy putting his hand over his face. Jackie never said he did either. She said that before he was shot he had a "quizzical" look on his face. Interesting choice of word, don't you think? Since when does a person get shot and look quizzical? But, if he was shot with an ice dart which he barely felt, he might feel like something just happened, but he's not sure what. And so, he would look quizzical. 

But, covering his face doesn't make sense whether he was hit with a dart or a bullet. And again, nobody said he did that. So, I assume he didn't do it, and they fabricated this. Why? I presume because they didn't want us to see the look on his face. 

He emerges from behind the sign in a panic. and I agree with those who say he was trying to dislodge something from his airway. It may not have been a bullet. It may have just been blood. But, that was very different from this. If he was already shot here, then something else must have happened later to cause him to react the way he does in 225 onward. So, if he was already shot here, there had to be a separate shot that came after. 

So, I really think that what they did here was try to use the sign to distinguish the "before" and "after".  No damage to him before the sign, and all the damage after the sign (except for the fatal head shot).  That's the story they were trying to tell in what they did to the Zapruder film. They wanted it to all happen behind the sign, except for the fatal head shot.