A boy whose life was saved by an off-duty nurse had the opportunity to save his savior's life seven years later.
The first incident happened in 1999, when Kevin Stephen went into cardiac arrest after being hit by a baseball bat at a game.
Penny Brown, a nurse, was at that game and saved Stephen's life.
In a remarkable twist of fate, Stephen was able to return the favor when Brown started choking at a restaurant where he was working.
Full Story: Nurse Saves Boy, Boy Saves Nurse [CBS News]