I parked near a shelter displaying "VISITOR CENTER" and headed up the steps to the real visitor center. A Sign said there were fifty-two of them. Part way through the climb I snapped two pictures. The one at left is the second. A couple were partially visible in the first one and I snapped another to get a clear view of the steps. The energetic couple seemed to be in a friendly race and I watched the woman take a few of the steps two-at-a-time to catch up to the man. Shortly after they disappeared behind the trees I heard what I initially thought was laughter but quickly realized was not. When I next saw them, the man was on the ground with the woman beside him yelling "What should I do?" I hurried up the steps but by the time I reached the man he was trying to sit up. He had fallen and blacked out or vice versa. His knee was scraped and bloody but the main worry was the back of his head which had banged into the concrete and was bleeding fairly heavily. He quickly regained his senses and insisted on standing. I helped him to a nearby bench while the woman (wife?) ran to the visitor center and soon returned with wet paper towels. Before long, park staff arrived with a first aid kit and everything was soon under control but it was kind of scary for awhile.