That’s a handy ability to have in case you get locked out of your house/car. This bit of sage advice comes to us from the late Madeline L’Engles A Wrinkle in Time. If I recall correctly (not having a copy of the book on hand), Mr. Murray, Meg, Charles Wallace, and Calvin were in the grip of “IT” on Camezotz, and “Tesser, Sir, Tesser!” was Calvin’s anguished cry to Mr. Murray. After which they ended up on another planet in the Camezotz system, with Meg in tough shape for having tessered through the darkness, but in the able hands of her impromptu furry nursemaid, Aunt Beast.

This is a four-dimensional construct, a tesseract, or “hypercube.” More accurately, it’s the shadow of a tesseract, because we can’t directly perceive the fourth dimension, being three dimensional beings. The impossible (from our 3-d view) rotation you see here is a simulation of a tesseract. As the “inner” nested cube perpetually becomes the outer cube – that is the fourth dimension. It is the transitional space-time of getting from one state to the next. The “nesting” of one cube within another is an illusion devised to illustrate the four dimensional nature of a hypercube; there is only one cube, here, moving through spacetime.
If you could directly perceive the fourth dimension, all things would take on a “smeared out” quality. Not only would you see a person walking down the street, but you would see that person at every point along the “line” he follows through space and time.
This has important implications. Supposing you could move out of the third dimension, into the fourth at will, and back into the third, you could intersect the path of this individual at any point: when he was far down the street, when he was in front of your house, when he was far across town.
His perception would be that you popped out of nowhere.
So, once again, if you get locked out of your car or house, just slip into the fourth dimension, and “walk” to the spot in spacetime where your car or house wasn’t locked. It’s not far.
One more thing. All of this is grossly oversimplified, as there would be a lot more going on in the fourth dimension than just a guy walking down the street Everything is moving through spacetime, including the the earth, the sun, the galaxy. Our hypothetical person out for his morning constitutional is only moving in a smooth, straight line from our limited perspective.
As a 3-d being, I can’t even imagine, let alone describe, how jumbled and confusing the fourth dimension must be.