Well, I think my favorite middle finger to have ever been raised at the concept of physics was in an old Apple IIe game called (I think) Odyssey.
The point of the game was that there were monsters in the dungeon rooms (it was a game where the side of a screen led to a new room, no scrolling of rooms) and the only way to not get eaten was to hide inside these robots. You had a wire tool, and had to wire up the robots from inside to make the robots move and pick up keys and take them to the locks, and all sorts of stuff where you couldn't do anything directly because going outside meant getting eaten by monsters.
You also got things like "OR" gates and "NAND" gates and a microchip that you could go inside and program, and the whole point was to get kids to understand the basic concepts of programming logic.
But the thing was, every container was its own room inside. A player could carry Robot A, inside of which was a microchip, inside of which was Robot B. The player could then go inside of Robot B, which was inside of the microchip that was inside Robot A that the player was able to lift and move. You could then take Robot A outside, the microchip out of Robot B, stuff Robot B into the microchip, and then stuff the microchip inside Robot A.
The player was always the same relative size to the screen no matter how many recursive layers of containers they were going inside.
Hence, Magic Klein Bottles.
A
klein bottle is like a Mobius strip that is fully 3d. It is a container whose "outside" is also "inside". Hence, it can "contain" theoretically anything.
In one of the Touhou games, one of the characters decides to "hide the Earth" by stuffing it inside of a Klein Bottle. By which she meant having a Klein bottle, and declaring it was now containing the whole Earth, which somehow worked because MAGIC!
Most game containers operate the same way - a bag that contains objects that could contain that bag, itself.
See also: The Futurama where they wound up having a box containing the universe in their own universe.
Urist saw the goblin sentries up ahead. There was only one entrance, so there was no way to get around them. Stealth was of the essence, however.
Knowing what to do, Urist reached into her bag and pulled out her Klein bottle. Declaring that she was now "inside" the Klein bottle as she threw it over the sentry's heads.
Suddenly seeing an object fly at them, the guards at once ducked, and were alerted.
"Ulspa! Someone's throwing something at us! Quick, go look in that direction!"
"Hey, Ost, you're not sending me out there alone, you come too."
So the guards left, and Urist chuckled to herself before declaring that she was "outside" the Klein bottle again, and popped out of the Klein bottle behind where the sentries had stood, and where she had thrown the bottle.