DVD Production Credits
Go to [Special Features] and either highlight "HBO Films" and press [Down], or highlight "Play Movie" and press [Up]. This will highlight an icon. Press [Enter] for the DVD production credits.
Bonus Clip
Go to [Special Features], then hit [Downloads]. In the next menu, click on [Specifications]. Highlight [Special Features] on that page and press [Up]. the "A | S" on the coffee mug will be highlighted and if you click it you'll get a 1-minute clip about Robert Crumb.
Bonus Clip 2
...still in [Special Features], either highlight [Play Movie] and press [Right], or highlight [Main Menu] and press [Left]. This will highlight the speaker and if you click on that you'll get a 1-minute clip about the Genuine Nerd Toby Radloff.