Think of a time when you were driving in your car and were either in a car accident, or in an almost accident. You may have been sliding in the snowy road, or worse, had that white knuckle feel of hydro-planing on a wet road. You squeezed the steering wheel and for a few moments (seconds) you felt an incredible flush of hormones, and held your breath. As you were able to "reason" within yourself that you were safe, the hormone levels quickly dropped,
