Saw Uncut Edition Easter Egg - See Saw in 60 Seconds

Stick in the second DVD. Go to the "Cut Media" menu. You'll see a bunch of tools.devices that were used in the movie. Hilight the chain and shackle then press up to hilight a hidden x. It'll take you to another menu where you can decide to go back to the previous menu or to go ahead and watch a little feature.
If you press the 'GO' button you'll watch a feature called "See Saw in 60 seconds". This is a short 60 second feature that plays out Saw with dolls and sounds from the movie.

Though I've seen a lot of things re-enacted with dolls but I still find them to be pretty entertaining, including this one.