Question: How does the effect on Indiana Jones Adventure(the rolling boulder) work?
Answer(mycroft16, BurtGummer, RedHandedJill): You don't actually ever move backwards... that would be incredibly dangerous in a ride situation. The walls around you move forwards away from you and the boulder moves slightly towards you. The boulder is mounted on a very large steel mechanism that rotates it and moves it forward. Your brain just assumes that very big things don't move, so when the walls move forwards, your brain thinks it's you moving backwards. If you look towards the ground where the wall meets it next time, you can see it moving the other way while the ground (and you) stay stationary. As for the sound... big subwoofers create the shaking feeling and then couple that with the motion controls in the base of the troop transport and voila.
The view from behind the boulder:
[ame="http://www.youtube.com/watch?v=Hq6gMddaDw0&feature=channel"]YouTube - Indiana Jones Boulder Effect[/ame]
[ame="http://www.youtube.com/watch?v=NRU8zdc2rCQ"]YouTube - Boulder Scene Diagram[/ame]
Question: How does the Chamber of Destiny effect work? Are there really three different rooms?
Answer(BurtGummer, Indiana Jones Adventure - Wikipedia, the free encyclopedia): The Chamber of Destiny actually has only one working door, with only one corridor behind it. The walls and ceiling of the room rotate over the working door and a set of four facades (two on each side of the real door), so that three "doors" are visible at any given time. The doors and the Hall of Promise are lit differently based on which particular chamber has been chosen. Fake tracks lead up to the other doors to enhance the effect.
[ame="http://www.youtube.com/watch?v=E2fZB-SIFak&feature=channel_page"]YouTube - Chamber of Destiny - The effect revealed[/ame][ame="http://www.youtube.com/watch?v=YNyuCeclLVA"][/ame]
Question: Does any part of the queue go underground, or does it just use forced perspective?
Answer(Eric5675): The queue goes underground to pass under the Disneyland Railroad tracks, but the ride is not underground.