Zombie? Not zombie? The eyes have it. While we don’t know what’s going on with this fellow — perhaps he just realized that he failed to file tax returns for the last 10 years — we can see that he is experiencing genuine human emotion. At this point in time, he’s not a zombie anyway.
Of course, part of the trick of Undead Management is realizing that we were all human before we were zombies. We must train ourselves to recognize those people who are going over, those people who are crossing the line into Undeadness.
I suggest you immediately ask this fellow what’s wrong. If he starts talking about his taxes, you can get in the elevator with him. But if he can’t give you a good reason for that expression, it’s time to starting easing away or even running in the opposite direction. This is good advice whether Emoting Dude is about to become Dead Man Walking Dude or simply In Serious Need of a Shrink Dude.