it's the inconstant see of human behavior, that humans will become optomistic, over optimistic and drive the economy in to -- >> charlie: humans will believe that housing prices will never go down. >> that's exactly. how in the world did they get that idea? once they -- george and i emphasize that it's driven by stories. that narratives drive -- for example -- >> charlie: the animal spirit is driven by stories. >> right. people have story of their lives. a story of my country a. story of what epic am i -- what great historical things are happen. >> charlie: what movie am i in? >> that's exactly right. people tend to view themselves -- >> charlie: we've seen this movie before they sometimes will say. can ahead. >> what was happening in the 1990s there was sense of possibility. we were entering the new millennium. the internet had just been discovered. young people were setting up dot.com companies. these stories were very powerful, because they suggested what we should be doing. i felt -- we feel like a lose fer we're not part of this. >> charlie: it suggests old rules didn't apply. >> so