Let's add a little 'thought experiment' to the above mix, courtesy of quantum mechanics. (For other people like myself who need a bit of an explanation, and this is a very basic one, Schrödinger and others suggested an atom or photon could exist in a multiple, undefined state until it collapsed into one or the other due to observer effect. Hugh Everett considered that instead of either/or states, both might persist, in a many-worlds interpretation.
Here are a few crazy story ideas: what if we replaced atoms and photons with the idea of a flat or round Earth? What if the Earth really was a flat plane, surrounded by a glassy firmament, which shifted into a round planet, due to our intrepid observer above? What if there were two Earths as a result? What if our observer travelled between them, disrupting balances? What if there was a flat Earth/round Earth battle between the Church and astronomer wizards involving gravity magic?
What if Venice sank due to some magical gravity screw-up? (After all, a good story should always have a bit of the unexpected in it.)
I do hope you send us some bizarre stuff. (The Submission Guidelines are here.)
In the meantime, happy writing. - Susan.