That's because he has a Kodak Carousel. http://www.youtube.com/watch?v=suRDUFpsHus

There's nothing wrong with using visual aids to help you deliver your message.

Funny, that's just the scene I was thinking of.

Imagine if he had preceded his visual aids with a couple dozen boards of charts and bullet points, and shrunk the pictures down to quarter size to make room for blocks of text explaining what he was about to say.

Visual aids are great. Projecting the text of your speech on the wall, not so much.