The concert hall is a unique place. I can think of no other place in which the attention of so many people is so singularly focused. Be it the opera, ballet, symphony, or chamber recital, the attention points to the stage. And because the rests, the silence, in music is as important as the notes (just ask John Cage), that attention remains unbroken through the performance. This leads to what may seem a stifling atmosphere to many -- full of obscure and antiquated rules and traditions. In actuality, there is only one rule, and it exists for good reason. That rule is: do not disturb.