This is an example of a good commentary! Maybe it's not the most information filled, but it sure has enough facts about everything related to making this movie. It also has the little more-or-less-funny details, these mostly provided by Jake Gyllenhaal. Gyllenhaal turns out to be a really funny guy, remembering all the funny situations and anecdotes from the filming. (He even does a great imitation of Christopher Walken. How he gets there is just a perfect example of this conversation floating into surprising places.)