John Hinderaker at Powerline blog had the same experience yesterday as I did listening to Hugh Hewitt's radio show. I'm linking here to his post with commentary nobody could do any better(escpecially me) along with the video of Obama's horrible stumble.
It now appears-upon after seeing the video-pretty obvious that President Obama has been relying virtually 100% on his teleprompter, sad as it is. As you may know, his teleprompter now even has its own blog. Serious.