I was sat on the bus today, across the aisle from a very prim and proper-looking woman, perhaps starting to head towards late middle age. She was stylishly but not extravagantly dressed. She looked a mixture of approachable and no-nonsense; assertive, independent; possibly in a senior, powerful job.
These were my immediate assumptions, anyway, I've no way of knowing how accurate they might be.
What I certainly didn't expect was that, when I suddenly heard the opening riff to Paranoid by Black Sabbath, it would be the ringtone on her telephone.
I like being surprised like that.