Go to Animation / Pencil Test menu. Highlight Chainsaw. Go right three times. The woman with the chainsaw on the menu will become topless. Hit enter to see animators names.
On the main menu page, select PLAY MOVIE, then go up once. The size 10 on the right bowling shoe will change to 15. Then press your Enter button to see the info on the company that authored the DVD. (15 is the owner's shoe size.)
All easter eggs were generously submitted by SirDonk