A friend confides in you that after a week of intense stress from final exams, they experienced a single, terrifying episode with a racing heart, shortness of breath, and a feeling of losing control. They are now convinced they have a serious, lifelong anxiety disorder. Based on the typical occurrence of such events in the general population, what is the most accurate and helpful initial assessment of the situation?

A 20-year-old college student, with no prior history of significant anxiety, experiences a sudden, 10-minute episode of intense fear, a pounding heart, sweating, and a feeling of losing control during a high-pressure final exam. The student has no further episodes in the following year. Which of the following conclusions is most justified by data on the prevalence of such events in the general population?