Pema Chodron shares advice she was given in her first encounter with Trungpa Rinpoche. He said, “Well, it’s a lot like walking into the ocean, and a big wave comes and knocks you over. And you find yourself lying on the bottom with sand in your nose and in your mouth. And you are lying there, and you have a choice. You can either lie there, or you can stand up and start to keep walking out to sea.”
So, basically, you stand up, because the “lying there” choice equals dying.