>>11085983I'm being facetious, because every movie that deals with "bending space" uses that demonstration to explain to the audience, to the point it's become a meme.
The idea is that its showing how you can fold a 2d space through a higher dimension to make shortcuts.
If you were a flatlander who lived on the sheet, you'd never notice the bending because topologically its still flat-ish for you. If your flatlander started drawing a bunch of big triangles and measuring their angles they might notice that things aren't adding up to 180 degrees like they should.
When people talking about folding space time, it's 3d space being folded into a manifold and you can have similar shortcuts. It's hard/impossible to hold an actual image of this in your mind because we're still animals that evolved to live on the flat ground in a classical environment and theres just no good reason for your head to be able to intuitively reason and visualize that shit.
