Sitting on a bus, a man and a woman got on obviously in the middle of an altercation, no idea what it was about, but the man was saying something about the woman putting her finger up in his face. Woman came storming down the bus loudly proclaiming that he was a "stupid old man" and a "total arsehole" and carried on chuntering when she sat down. It was when she loudly proclaimed "I'm NEVER rude to ANYONE, EVER" that I had to stuff my fist in my mouth to stop myself laughing.