Not a terribly exciting one. I was a law enforcement explorer in high school (think boy/girl scouts, only career exploration-oriented). I went to a state conference when I was 16 or 17, and the state police handed out the cards to all of us for role-playing reference (we did traffic stops, domestic disturbance calls, drug raids, and I don't remember what all else--all role-playing scenarios, of course).

I kept my card just because you never hear more than the first sentence or two on TV--and besides, it's cool. ;-)