Greetings from Ben Stiller
On disc 2, select the title "Criteron Collection". You will receive a welcome from Ben Stiller and his two sons from the movie.
On disc 2, select the [Murals] menu entry and then highlight the entry called [Storyboards]. Then press the [Down] arrow key and the Dalmatian mouse on the floor will be highlighted. If you press [Enter] now you will get to see some behind-the-scenes footage of Bill Murray elaborating on mice and snakes.
Click on [Scrapbook]. When it loads, you should see a small picture of flames in the upper lefthand corner of the screen. Scroll over to it until its border is highligted in black. Click on it to see a firey outtake.