Butterfly Effect Print
The Butterfly Effect is the poetic explanation about that everything that happens will affect the big pig picture over time. (As we wouldn’t know that for a fact from before)
But for those who need an example, and one they can relate too better then the butterfly/hurricane:

Football scenario: 22 pairs of legs (that's 44 legs, maths and legs fans!*) influence the euphoria of a nation, influence that nation's road traffic patterns, influence the number of people who die on the roads that evening. It is totally rational to conclude therefore that a single game of football raises the number of parallel universes out there to the power of millions and billions.