Fun with a physics engine, and Tycho had some killer commentary:
http://www.penny-arcade.com/
Tycho said:Apparently people who bought it at retail had some trouble getting their copies running right, it was fixed shortly thereafter. I'm given to understand that people who ride horses to work or in other ways live their lives discordant with science and reason also suffer because of their strict adherence to anachronism. Get with the fucking program. Stop mixing those specious folk remedies and download your games directly from the Intertron.
http://www.penny-arcade.com/