Just Wondering

This question has always popped in my mind ever since I became an employee several years ago. You noticed people grinning and preparing for something to do when they know that their superior is going somewhere. I'm also a culprit of this act because there is a type of superior that you don't always want to be around with.

However, if I were that supervisor, I would start to think about it because it reflects on your personality and the way people treat you. If they are happy when you're not around, do you think that they are who they are in front of you? There is a trust factor in this, for me, because I want to trust my employees reactions are true when they are talking to me. I would be normal for some employees to be happy just a little bit because that would mean less work but if they are already planning something to do when you're out, that would be different.

Care to share your comments on this matter?