The Cloverfield DVD contains at least two Easter Eggs, and here's how to find them.
At the Main Menu, highlight Set Up and press Enter. At the Set Up Menu, highlight Español under Subtitle Options. Press the right arrow and a red helicopter icon will appear. Press Enter to see a clip of various people riffing on the lines, "Rack 'em and pack 'em. We're phantoms in 15."
At the Main Menu, highlight Scene Selection and press Enter. At the next menu, highlight 09-12 and press Enter. Then highlight the icon for scene 10 at the upper right of the screen. Press the up arrow and a red X will appear. Press Enter to see footage where characters in a subway tunnel seem to be attacked by green crossed lines, but in the finished film these lines are replaced by nasty parasitic creatures.Cloverfield DVD Cover Art - © Paramount Home Entertainment