We have all used our "mean look" at one time or another to get the students attention. In fact, it has been said that you have achieved your goal as a teacher/parent when all you have to do is give them THE LOOK! What is YOUR mean look? Mine...I have a few, but the most common is the when my very dark eyebrows go down and I freeze my face, with lips slightly protruding. It's best if my glasses are slightly resting on the middle of my nose. The kids stop dead in their tracks.