Nothing in particular, from what I can tell. I once read that imagination is partially the unexpected and slightly random interconnections between barely-related ideas. If that were true, then imaginative people would just be really good at mixxing their experiences together in their heads to produce something that seems new.
I, for one, *rolls dice, enterprets the numbers on a table* ...disagree! (Or, hold it, that's not a nine, that's a six.) I apparrently (uhm) don't care! It's irrelevant as long as it feels the same to us, right?
*Points at the idea of the Tokyo skyline* Look! It's Meta-Gojira!