When a New York woman registered a blood alcohol level of .40 on a breath test after being pulled over for suspected DUI in 2015, police immediately rushed her to a hospital. But she had not had a drink in hours, and she had no symptoms despite having a life-threatening level of alcohol in her system. It turned out that the woman suffers from a rare medical condition called auto-brewery syndrome, which causes carbohydrates to turn into alcohol in the body. DUI charges that had been filed against the woman were dropped, and she underwent treatment for her condition.