Jumping between worlds is nothing new in Speculative Fiction. Each week, the characters may face evil versions of themselves, worlds where the Big Bad has won, and even worlds in which they themselves are the villains. However, no amount of dimension hopping can prepare them for the subject of this trope -- jumping through a portal and ending up in a world with no aliens, monsters, magic powers, Phlebotinum, or threats to humanity. Furthermore, everyone they meet seems to think that they are fictional characters. People, you have just successfully broken through the Fourth Wall; Welcome To The Real World. This truly is the ultimate reality, and furthermore, it's the world in which you, the person reading this, live.