Shock Physically is a term used to describe a medical condition in which the body experiences an intense physical reaction due to a traumatic event. This reaction can include a rapid heart rate, sweating, trembling, and difficulty breathing. The term is often abbreviated as JAR, which stands for 'Jump, Adrenaline Rush, and Shock'. This condition can be caused by a variety of factors, including physical trauma, emotional trauma, or extreme stress. It is important to seek medical attention if you experience any of these symptoms.