Flip on the TV, and you're bound to find shows of horror, mystery and the macabre. Many people love the thrill of terror as suspense builds during a scary movie. These flicks can make your heart pound harder and eyes widen. The question is: Why does your body react when you know that what you're watching is not real? Dr. Regis Fernandes, a Mayo Clinic cardiologist, has some answers in this Mayo Clinic Radio Health Minute. To listen, click the link below.