Easter egg: Go to the Main menu, then to Special features. On the Special Features page highlight the little "New Line Cinema" logo, to open a page of credits.
Easter egg: On the special features part, go to galleries and select the wolverine dog tag at the bottom.
Easter egg: Go to the first page of the "special features" menu. Once there, highlight any one of the special features on the page and press right once to see a short clip of how the filmming crew put on make-up.