F1 Rule changes for 2009

This is an excellent animation showing the changes in Formula One for the 2009 season. I think that it is extremely effective in a number of ways:

Context- It shows the cars in the context of race competition.
Relevance- While explaining the changes, it graphically demonstrates how they affect the cars and competition.
Clarity- Each of the changes are clearly shown and irrelevant info is excluded.
Causality - When changes are explained in detail, there is a clear demonstrable cause and effect.
Narrative - There is a clear beginning, middle & end. the changes are demonstrated during the course of a race lap.