It's kind of like... changing the channel on a radio. You know how if you have the dial just a little off, you'll still hear the music from that station, but it'll be fuzzy, and you might hear some other stations too?

That's what the Ghost World is like. It looks just like the real world, but time is frozen. Everything is monochrome. You can tell which things are alive and dead, see through walls, find places for your soul to possess... that kind of thing.

Ghosts can't move in the real world. I have to "change the channel" to move from place to place.