One day while a friend and I were walking around the stunning gardens at the Getty Center, I turned to her and said, “I really want to roll down that hill right now. Should we do it?” “I was thinking the same thing,” she said with a smile. Within seconds, we were racing to the top of the moderately steep hill. We got into position on the flawlessly manicured grass, stretching our bodies into a straight line, tucking our arms near our chest. Then we joyfully surrendered to the forces of gravity that pulled us down into a dizzying whirlwind until we reached the bottom. Once we found our balance, we brushed the twigs and grass off our clothes, then ran up to the top of the hill to do it all over again. Our giggles could be heard across the massive garden and passersby smiled as they walked by. Then before we knew it, the small groups of people who were sitting on the grass near us joined in. One by one, people of …