This thankfully has no immediate relevance to my own work situations. A net.friend was axed from his job yesterday for "failing a random drug test." This guy doesn't do illegal drugs and has yet to find out which false positive was tripped. Eventually the conversation drifted into intuition about knowing when you're going to be fired.
After working many years in high-tech, I say it's not intuition because it's the same signs over and over again.
( Behind the cut-tag are some signs of impending termination I've always wanted to share, along with what you can do about them. )