Go to [Extras]. Keep hitting the [Right] arrow button until it lights up the shadow of the Zombie on the right side of the screen. Press [Enter] for an interview with Chris Romero (George's wife) on how they met and fell in love. Go to [Audio]. Keep hitting the [Right] arrow button until it lights up the shadow of the Zombie on the right side of the screen. Press [Enter] for an interview of Tom Savini explaining how he scared his girlfriend.
Buddha Loves Dawn of the Dead
On disc four, arrow [Left] and press [Enter] to see a video in which a buddhist discusses his love for Dawn of the Dead.
Helicopter Zombie
On disc two, go to [Extras], then choose [Commentaries]. From that menu arrow [Left] to highlight the zombie and this takes you to an interview with effects artist Greg Nicotero discussing how Savini created the infamous "Helicopter Zombie".
Practical Joke
On disc one, from the [Main Menu] go to [Audio Setup], then at that menu arrow [Up] or [Left], and the zombie silhouette will highlight. This will take you to an interview with makeup effects artist Tom Savini, talking about a funny practical joke he pulled once.