I often listen to the online lectures of the University of Berkeley. The other day I was listening to this class about globalization when all of a sudden I could hear the sound of a cell phone ringing. Without missing a beat the prof said " That call better be from god . "

Here in Japan I have had about 4 years experience teaching classes of around 20 people in their late teens or early twenties. They all have at least one cell phone. Miraculously , I have never once heard one of those cell phones ring during one of my classes!