We generally don't recommend that people try to take justice into their own hands—unless it maybe involves cell phones in public places—but once in a while, it seems to work out. Like in the case of Emil, the man who uploaded the video below: he confronted a bike thief on the Upper West Side in July on camera and was able to shame him into putting a stolen wheel back.
Of course, Emil then followed the thief ("like a ninja") only to watch as he tried to steal another bike a few blocks away. At that point, he hailed a cop who came and apparently ticketed or arrested the thief (you can see him detained in a still photo toward the end of the video). We think Emil certainly earned himself the jaunty soundtrack music.