I cannot resist the notion that the first across-the-USA total eclipse was a sign of evil times. But the happier chips of me left take comfort in one of the huge benefits of science, in this case astronomy, in making a reasonably predictable universe. Otherwise, the sun going out could be the beginning of freakin’ anything, including that it would not come back.
The Aztecs had a particularly creepy mythology associated with eclipses: the sun was under attack from the stars you could see around it when it turned black. These are the female deities/demons Tzitzimime, quite the monsters.