Fable: The Journey may not launch until early October, but you'll be able to take its virtual reins on September 17 when a demo for the game goes live worldwide on Xbox 360. Microsoft and Lionhead describe the demo as filled with "heart-pounding action," so, uh, maybe take some heart medication ahead of playing the game.
Should the potential for heart failure caused by playing a demo worry you too much, you could always just watch the new "ViDoc" above. It's a lot like a trailer, but with a weird name. Take a look!