Why does this relate to Fiyero's future status as the Scarecrow? You may remember that, in "The Wizard of Oz," Dorothy, the Tin Man, and the Cowardly Lion end up passing out in a field full of ...

are whisked away from their house to the magical Land of Oz. They follow the Yellow Brick Road to the Emerald City to meet the Wizard, and on the way, they meet a Scarecrow who wants a brain ...