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

Another thing I would tell Steve Barber is that Jackie was definitely not grabbing for the window frame. That's because Jackie's thumb is behind the window. It is partially covered by the window frame, while the window frame is intact in the image; hence the frame is in front and the thumb is behind. 

To grab hold of it, her thumb would have to be in front of it. 

Furthermore, that is an action that would surely entail looking at the object she is grabbing. She wouldn't do it blindly. She would cast her eyes on it. But, it appears that Jackie is looking straight ahead and NOT in the direction her hand is going.

You have to think this stuff through, Steve. You know?