My father began teaching business classes at the local prison through a community college. On his first night of class, he started a chapter on banking. During the course of his lecture, the subject of ATMs came up, and he mentioned that, on average, most machines contain only about $1500 at a given time.

Just then a man in the back raised his hand. "I'm not trying to argue," he told my father, "but the machine I robbed had about $3,000 in it."