One of the students in my middle school put it into beautiful terms. One day, they say "You know, the TV in your forehead?" as they put 3/4 a square with their fingers onto their brow (like a "C" shape) I still get chills thinking of the phrase sometimes, it just was so understandable and approachable for us 6th graders.
Mine defaults to a TV in my forehead, but with a little nudge, I can move it out it into it's own 3D space that I can view from inside or out. The level of detail is still the same, weak in my case.
(Edit: word choice)