Ok in Chapter 39 "Yoda Visits the Emperor," Yoda confronts the Emperor and blocks his way out. Yoda says "Faith in your new apprentice, misplaced may be; as is your faith in the Dark side of the force". The Emperor raises his lightsaber over his head, then Yoda leaps over him. As he does so watch closely as the Emperor's hood falls completely back, Yoda lands, and it immediately goes to a wide shot, where they cross sabers and his hood is back up as if nothing happened.