This is the Jackson lookalike hand from the newsreel that Sparta posted. Believe it or not, that is supposed to be a thumb on our right. Say hello to another freak hand:
But, thumbs don't look like that. They're not that long. They don't go that far. And they are not aligned parallel with index fingers.
This is not a human hand:
It's just more bogus imagery from an event that is swimming in bogus imagery. The JFK assassination is the most photographically falsified event in human history.