I was trying to draw parallels in AngularJS and something like RobotLegs (which is my preferred MVC framework when building Flex/Flash applications). Here are some interesting findings:
$scope.$root == $rootScope
There is no need to inject both $scope & $rootScope in a controller definition. $scope is enough.
This is the opposite of bubbling up an event. In this case, it’s drilling down descendent $scopes in the $scope hierarchy.