Go to [Scenes], directly to the [Left] of chapter 3 you can highlight a flame symbol. Press [Enter] on the flame symbol after you highlight it and you will see a clip of The Rock talking about how he got in shape for the movie.
On the [Main Menu] there is another invisible flame symbol directly above the [Scenes] option. Press [Up] and it will become visible. This clip shows how they did "neck vision" as well as some other effects of the movie.

Go to [Bonus Materials], then click the arrow on the bottom to go to the second [Bonus Materials] menu. To the [Left] of [DVD Rom Features] there is another invisible flame symbol. Press [Left] and it will show you a clip of Seann William Scott talking about how he got in shape for the movie.

Go into the [Languages] menu, directly above [English 5.1 Dolby Digital] there is yet another invisible flame you can highlight by pressing [Up] from the english 5.1 option. Press [Enter] and it will show a clip of The Rock talking about Seann.

Go into [Bonus Materials], then go into the second page of the [Bonus materials], then click on [Cast and Filmmakers]. On the first screen there is an invisible flame directly to the [Left] of [Christopher Walken]. Highlight it and click and you will see another clip.

Go to the second page of [Cast and Filmmakers], there is another flame to the [Left] of where it says [Directed by Peter Berg]. Highlight and click for another clip.

On the same screen, to the immediate [Right] of where it says [Executive Produced by Vince McMahon] is another flame. Highlight and click for another clip.

While in the [Cast and Filmmakers] section, choose [Seann William Scott as Travis] and go to page 3 and press [Up] to highlight [Identity Films]. Select it for Seann talking about his production company.