Just had a thought while watching the Rancor scene in ROTJ on Spike.

When Luke is in that alcove with the door in the back of the Rancor's lair, it would be impossible for the crowd watching above to see him in there, yet instead of looking for him, they keep on cheering.

SO... what if instead of the crowd watching through a cage, they're watching a viewscreen on the floor showing what's going on inside the lair? It's not improbable for there to be cameras in the unseen areas of the lair, and it would make the scenes of the crowd watching a lot more interesting.

In my opinion, at least.