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

There are lots of ways of waving because there are multiple joints involved: wrist, elbow, and shoulder, and it depends on which you mobilize the most. So, exactly how Jack and Jackie were waving at that moment, we don't know. And why speculate?

But, regardless of how a person is waving, you expect them to have an intact arm- if they do. And Jackie did. It's a weird image of her.