Go to the stage Count Dooku.When fighting him, go to the left, there should be an object there. Destroy it, then force it(Watch out for count dooku). If done correctly, the camera should point at two lights.Force them.Finally, two buttons are near the wall with the object forced. Step on the buttons and the wall explodes revealing a tunnel(you can't travel through the tunnel).Jump in the tunnel, and Dooku also jumps. If you are close to the edge, Dooku will strike without hitting you, and do a backwards mega-jump! As long as you are in the tunnel, you can,t be hit by Dooku!