In November 2000, Lisa Reid, a woman who had been blind for more than 10 years, bent down to kiss her guide dog goodnight and hit her head on a coffee table. The next morning, she opened her eyes and realized she could see again. Lisa lost her sight as a child. When she was 11, she developed a brain tumor. Surgery saved her life, but the tumor had already damaged her optic nerves. Doctors told her she would never see again. But somehow, one bump on the head had brought it back overnight. No one could explain how. Seeing the world again was a huge shock, especially when she looked at her little brother for the first time in years and realized he had grown into a man.