“Chaos theory. Sounds dramatic, but it's not. Ask a mathematician. Better yet, ask someone who's been in a hurricane.”— Brian Yorkey, imdb.com
“You've heard of the butterfly effect, right? That if a butterfly flaps its wings at just the right time in just the right place. It can cause a hurricane thousands of miles away. It's chaos theory, but see, chaos theory isn't exactly about chaos. It's about how a tiny change in a big system can affe…”— Diana Son, Hannah Baker, Katherine Langford, imdb.com