From the main menu go to Audio Setup, then at that menu arrow up or left it doesnt matter, 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.
Go to Extras menu, and from there arrow up or left to highlight the zombie. This takes you to an interview with Chris Romero about how she met her husband.
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".
Go to Extras, then choose Trailers. Then arrow left twice and press enter to an interview with the man who played the "Screwdriver Zombie".
Arrow left and press enter to see an interesting video in which a buddhist discusses his love for Dawn of the Dead.