When Julio Diaz stepped off the New York City subway platform after work one night, he was simply planning to walk over to his favorite local diner for a meal. But when a teenage boy approached him with a knife blade gleaming in his fist, Diaz, a 31-year-old social worker, knew the evening was about to take a more dramatic turn.
The young man demanded Diaz's wallet, and Diaz passed it over without objection. But just as his mugger turned to walk away, Diaz called after him: "Hey, wait a minute. You forgot something."
The mugger turned around, surprised.