Much has been written about Larry Lessig and a technique he became known for which is now dubbed the "Lessig Method" of Presentation.  Simply put he used to use only a black screen and have key words come across the screen timed as he spoke them as part of his sentence.  Google "Lessig Method" and you can find many examples. 

The TED talk below is different.  Yes, he still uses the typewriter technique at time but he presents at TED with a masterful use of Visuals to bring home his key points. 

How creativity is being strangled by the law

He presents a very, very convincing case on!!