Four hours. That was the amount of time between looking down the barrel of a gun and finding myself free along a silent highway lined by cotton fields. In the time period that seemed eternal, my unique experiences as a doctor created an indescribable bond between myself and my captor. I looked upon the situation just as I looked upon a medical emergency: I took a deep breath, hid my panic, and tried to solve the situation.In March 2005, Dr. Steven Berk was kidnapped in Amarillo, Texas, by a dangerous and enigmatic criminal who entered his home, armed with a shotgun, through an open garage door. Dr. Berk's experiences and training as a physician, especially his understanding of Sir William Osler's treatise on aequanimitas, enabled him to keep his family safe, establish rapport with his kidnapper, and bring his captor to justice.This harrowing story is not just about a kidnapping. It is a story about patients, about physicians, and about what each experience has taught Berk about life and death, mistakes, family, the practice of medicine, and the physician-patient relationship. It is a story about how Berk's profession prepared him for an unpredictable situation and how any doctor must address life's uncertainties.