text:  Each foot of water weighs nearly one million tons per square mile. All right. So calculate the square miles and look at that load that old Mother Earth has to endure, and she will occasionally slip a disc. All right. Well, we'll talk about slipping discs in a moment. Relax for a few, and we'll be right back to you. That's why he's here. That's why Jim Berkland is here, a retired California geologist, and he'll tell you about this window that we're moving into right now.