This is not how we usually think of worship (image of newspaper ad): "The splitting of the gut, the slapping of the thigh, and the peeing of the pants." But if the topic is Sarah and Abraham, it makes perfect sense. I can't do better than to share Frederick Buechner's description of the scene: 

The place to start is with a woman laughing. She is an old woman, and after a lifetime in the desert, her face is cracked and rutted like a six-month drought. She hunches her shoulders around her ears and starts to shake. She squinnies her eyes shut, and her laughter is all China teeth and wheeze and tears running down as she rocks back and forth in her kitchen chair. She is laughing because she is pushing 91 hard and has just been told she is going to have a baby. Even though it was an angel who t…