>> but eric jenkins isn't ready to give up. one last-ditch effort to get away, he jumps out of a fourth story window. he hits the ground, shattering his ankle. >> get up! >> ultimately, jenkins pleads guilty to stealing our bike and serves time in prison. according to kryptonite, a leading lock manufacturer, new york city is the worst for bike thefts. we lock our bike to a tree using a standard cable lock. in less than 15 minutes it catches the eye of a bike messenger later identified as joseph cruz. he circles once to check the lock. ten minutes later, he's back on foot and brazenly pulls out a pair of bolt cutters from his messenger bag. in a matter of seconds, the lock is cut, bolt cutters back in the bag and he's off. cruz doesn't know he's being followed as he winds through afternoon traffic on his stolen bike. we follow cruz to the messenger service where he works. a few days later, correspondent chris hansen confronts him. >> how are you doing? >> can i show you something? i've got to ask you a quick question. i need to