Architects of Rochester Institute of Technology broke the plane restriction and built a "Panlos staircase" on campus. I saw the characters in the film quickly climb the stairs and disappear in front of the camera, but at almost the same time, they came up the stairs at the lower corner of the camera.

The staircase of Rochester Institute of Technology is based on the illusion that the whole structure is built at a certain angle, that is, the heights of the two angles on the horizontal plane are roughly equal, but there seems to be a gap in this closed space. It should be a trick of background and photography.

Think about it. Not two flights of stairs, but two straight zebra crossings. You go straight from A to B, and then 180 degrees turn around and walk back. Is it back to the origin a?

Then imagine that the whole thing happened in a closed square house, and then you tilted the whole house dozens of degrees. Of course, the design should cover up this trick. When you enter the room, there is no horizontal plane as a reference, and the handles, stairs and decorative paintings of the room are cleverly set with a false horizontal angle suitable for the inclination angle of the room. All this has become mysterious.