Sentence:  I thought I was a hypochondriac because my friends said that I was showing unnecessary concern about my health. Thanks to Dr. Cartwright I now know that I am a diseased man. I suffer from the acute stages of a chronic disease: <WSD>drapetomania</WSD>. I have the obsessive desire to run toward freedom. You have the right to know that a diseased man is near you because, and I say this carefully, <WSD>drapetomania</WSD> is contagious, and I am glad about it. As a drapetomaniac, I belong at a Freedom Fund Banquet. 
Meaning of the word marked with <WSD> tags:  an overwhelming urge to run away (from home, a bad situation, responsibility, etc.)