Something's a little off

Such randomness on the train on a Saturday morning! A boy, who looked like he was 15, was standing up announcing the stops as though he'd been hired by the MBTA, except that he deboarded at some point and walked out on the job. Then, an old man got on with a bik that he rattled violently, to the point where most people got off or switched cars at the last stop. Whaaat in the world?