"I think I might know something about this secret Hidden Mickey you mention. On one of our recent visits to the new Little Mermaid ride, there was an off duty CM walking through the queue with us. She stopped and was pointing out details in the queue to her friend. At one point, she stopped at a place near one of those virtual crab portals, and knelt down and pointed to a spot on the wall. She then pointed up to the ceiling and showed where there was an opening. She said that when the sun was in the right position, the opening would cause a shadow of a Hidden Mickey to show on the wall.