Here's a site that has 28 pictures of Bush during the debate. All the pictures, taken when Bush was in various poses, show the same rectangular bar across the back of his suit jacket, at about shoulder blade height. The bar doesn't change even when Bush shifts position.
The site also shows the frame in which Bush says "Now let me finish..." even though no one is interrupting him, the green light is on, and he has a clear 30 seconds to finish what he is saying.

When the site comes up, you will see 28 thumbnail sized images. Move your mouse over them and you'll get an arrow that you can click to enlarge. You will then have very large images side by side, that you can scroll down through.

Have fun -- I did!

BushBulge