It shuts down. I'm being a little flippant, but also a little serious. Sometimes you get credible warnings. Sometimes it just comes out of the blue, because it

It shuts down. I'm being a little flippant, but also a little serious. Sometimes you get credible warnings. Sometimes it just comes out of the blue, because it's in management's best interest to keep any impending issues very quiet. It's good to be looking for these things, but in my experience as soon as your spidey sense goes off, you should have an eye on what's next.