Everyone in your company is worried about some worker who might be vomiting in the rest room and whether you have a policy about allowing that employee to return to his or her cubicle. Of course, you have to address that, pronto. That's called "crisis communications."
The primary objective in crisis communications is to calm people down. Young people have achieved that through The Smirk. That one facial gesture makes parents, guidance counselors, clients for their mowing service, et al. feel that they have over-reacted. No question, those made to feel so foolish will back down and off.
Unfortunately, with the acquisition of professional status, The Smirk seems off limits. Only those leaders who are extremely confident will leverage it.
Now you know: You can also leverage it. For instance, you flash The Smirk when you sense members of the audience for your talk on company policy and Ebola are becoming angst-ridden. You mention the media headlines. You give The Smirk. Listeners get the message: Their emotional state is not aligned with reality. They return to their desks in a mindset focused on work.
Of course, like all facial expressions, The Smirk must be planned strategically. The annoying board member says something dumber than dumb in the locker room at your club. No, you don't do The Smirk. Your strategic plan for managing the board member is to use your body, ranging from height to weight, to signal your power. The Smirk doesn't fit in with that.