When travelling on a train it's often quite interesting to hear how people follow up the stereotypical "I'm on the train" when talking on a mobile. I think one of the most random things I've heard was the woman earlier who said "I'm reading about the Flat Earth Theory."
Currently I'm en route to Exeter and having spent quite a bit of time on a train in the last couple of days I have discovered a new pet hate.
I have been irritated several times by those people who stand in the vestibule of a coach by the sensor for the sliding door in to the seating area and thus keep the door open, or worse cause the door to open and shut incessantly. I'm amazed by the number of people who remain oblivious to the fact they are responsible for that infuriating 'open-shut-open-shut...' of the door in question but I want to give special congratulations to the joker this morning who continued to stand by the sensor even after he'd been asked to move.