Exit signs are often taken for granted, but Imagineers don’t like to leave anything unthemed. Even if it’s just a font change, the standard emergency exit signs that are found in most public places are crafted to blend into their environment.
My favorites are the signs inside the Tree of Life Theater (otherwise known as It’s Tough to Be a Bug). Most everyone is still watching the screen and listening to the message about the beetles, maggots, and cockroaches) when the signs come to life, but it’s a pretty nice effect, consisting of swarms of fireflies that converge onto the signs and then spend the entire exit-time buzzing about inside. Just another bit of magic that goes unnoticed because there’s so much happening at once.