All's Quiet in the Elevator

So I noticed one thing today about the crazy chaotic noise of New York City. I was out on Park Ave during lunch and there's sirens, swat team (and dog), people chatting to each other and on the phone, people almost getting run over because they are in such a hurry...basically pure craziness. Even in the building there is constant chatter and clippity clop of high heeled shoes. But the minute you step into the elevator, pure silence. Even if you are crammed in there with ten people...still pure silence. It's amazing and kind of a little bit of a relief.