In The Mouth of Madness
Easter Egg :Hidden Trailer
From the main menu go to actor Jürgen Prochnow's filmography in the disc's 'Cast and Crew' section. Next to 'Twin Peaks: Fire Walk With Me' you will notice a small movie camera. Highlight that camera with your arrow buttons and press 'Enter' on your remote and you will get to see a trailer for that movie.

The Island of Dr. Moreau
Easter Egg :Special hidden thanks
Go to the main menu and move down to “Jump to a scene”. Now press the right arrow on your remote and highlight the New Line Cinema logo in the lower right corner. Pressing “Enter” will bring up a screen with special thanks.