If you’re a fan of the New York Times “Diagnosis” column, you’ll enjoy this oldie but goodie about a women’s “fainting spells.” We suspect many sleep professionals can solve this medical mystery.

The middle-aged woman perched on the edge of a plastic chair as the doctor explained his thoughts on why her son was having persistent headaches. Suddenly, she toppled forward, collapsing onto the linoleum floor. Dr. Philip Ledereich hurried over to the woman. “Call 911,” he shouted to his nurse. “The patient’s mother has fainted.”