Last weekend, I attended a meditation retreat. After an hour of sitting, a loud thump broke the silence. A man had just collapsed onto the floor. At first I thought he just fell asleep. Then he began shaking. I quickly got up and tried to help him. Another man, who just happened to be a doctor, knelt next to me. I helped straighten the man’s legs and put a pillow under his head while the doctor tried to wake him.