It is a sign of being tired, working on your computer too long or dealing with irritating clients over the phone. Also could be a general unhappiness with your life.
It happens when they get up, sit down, walk into your office, or while doing absolutely anything. The sign is usually accompanied by whining and complaining about one self.
It makes you wonder what everyone is so damn unhappy about?!
It's only Monday...(office sigh)
(office sigh) It's always so hot in here.... GAWD!