The problem with being a character in your own story is that you lose all your powers. You can no longer be omniscient, and you might even be demonstrably mortal.
That happened to me, but fortunately I was able to wangle a resurrection out of it. See my tagline.
I was thinking what it would be like to be a victim of dimensional hopping.
Something along the lines of two knuckleheads somewhere going, “What does this button do?”
And the results are that some poor sap goes on an uncontrolled vacation across different dimensions.
As for showing up in my own stories, I doubt I will seriously do such.