About 4 years ago I was a guest in a university career development class giving a lecture about the realities of job searching after college. As I was wrapping up my discussion, the bell rang and like BOOM everyone stormed out of the room. It was like a vacuum. In fact starting about 5 minutes prior I could hear them tensing up and grabbing on to their backpacks. I found the behavior completely rude. In that classroom of about 200 the only students hanging in the room to hear the final words of my lecture and ask follow up questions were about 3 or 4 Asian foreign exchange students.