Trauma is a person’s emotional response to a distressing experience. Few people can go through life without encountering some kind of trauma. Unlike ordinary hardships, traumatic events tend to be sudden and unpredictable, involve a serious threat to life—like bodily injury or death—and feel beyond a person’s control. Most important, events are traumatic to the degree that they undermine a person’s sense of safety in the world and create a sense that catastrophe could strike at any time. Experiencing a natural disaster, a workplace disaster, a hostile work environment, an auto accident(s), medical trauma, physical violence, sexual assault, military combat experiences, accidental physical injury, and the unexpected loss of a loved one are common traumatic events.