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

In this collage, Jackie's hand looks relatively larger on the right because she is closer to the camera. On the right, it looks relatively smaller because she is farther from the camera.

So, it makes it very odd that her hand should be so big here when it was outside a little outside the car. That's far. Yet, her hand looks huge. There is no diminished effect from her hand being so far away.