Let's take another look at some hidden detail inside the Tower of Terror. Imagineers placed so many references to the Twilight Zone, that the attraction is full of them for you to find. This one is found inside one of the libraries you go into to watch the preshow. If you happen to glance up, you will see a lot of different props adorning the wall above the cabinets that line the walls. One of them in particular has a special meaning.
The little red machine with a weird head on top of it is the Mystic Seer machine from the Twilight Zone episode "Nick of Time", which aired on November 18, 1960.
In the episode, Don S. Crane and his wife are driving in their car when their car breaks down in Ridgeview, Ohio. They stop at a diner where Don puts a penny into a fortune machine and it correctly predicts that Don will get the promotion he asked for. Don becomes more and more intrigued by the mystic seer machine and continues to ask it questions and only acting based on the answers the machine gives.
Eventually, his wife convinces Don of his errant ways to completely live by the machine and Don, realizing how foolish he was acting, apologizes to his wife and tells the mystic seer that they're leaving to go do what they please. As they leave, we see another couple sit down at the machine with pennies ready to start asking it questions, evidently this couple is stuck in Ridgeview, all because the machine has not told them they can leave.