2. The flap of a butterfly's wings changed the air around it so much that a tornado broke out two continents away.
Up vs. Down
Noon vs. Midnight
These choices, once chosen, are all examples of the Butterfly Effect and how one of these choices vs. another will affect one's life greatly.
2. As a butterfly flaps its wings in one part of the world, a disaster is happening in another part of the world.
(Also personified in the more popular saying, "Live and Let Die")
2. ... Also the name of a movie that portrays the previous definition. Er, I think. I haven't actually seen it. Is it any good? Excuse me if I don't hold my breath...
(Please excuse the politically incorrect referance. My most heart-felt apologies go out to anyone particularly connected the the incident portrayed in this example.)