I'm out on my lunch ride today which is normally 16 miles out and back. On the return with less than a mile to go, I get the 18" pass, swerving rear tires, plus the horn blast from a jerk weed semi driver.
Moral to the story...If you are going to buzz a cyclist in a company semi, make sure he isn't the Plant Manager of the company next door to yours, and definitely make sure he doesn't know your Plant Manager.
They aren't firing the guy, but he is being sent through a refresher safety course and reprimanded. Maybe he'll learn a lesson.