Economics

http://www.youtube.com/watch?v=VZv--sm9XXU

Could someone explain the point that that video is trying to get across please?

I really can't be bothered to watch it for an hour. But in Economics, alot of the theory is based on the rational man, for example they expect demand to rise if prices fall, if everyone was rational.
So i'd have a guess that he's talking about how loads of people are irrational and is trying to disprove aload of economic theory.

Feel free to watch the video and prove me wrong anyone.