A friend walked up and grabbed Lockett by the arm. A few people, noticing that something wasn’t right, walked Lockett to another room and called an ambulance. Lockett, who was 57 at the time and uninsured, didn’t know whether she could or should refuse the ambulance ride or decide which hospital it would take her to.Paramedics sped her a few miles to Emory University Hospital Midtown, where she was held overnight. It turned out that she had suffered a transient ischemic attack, or a mini-stroke. The hospital performed tests and sent her home, where she recovered fully.In May, the hospital bill arrived. Lockett had been charged $26,203.62 total for “observation,” which the bill instructed her to pay within 20 day