Harp

That's unusual, he thought.
He took the Underground to work every single day and he had witnessed many buskers and odd street performers on his commute, but this was the first time he'd seen somebody playing a harp.
The woman playing it was wearing a very expensive dress and had the hair and makeup of someone who was attending a fancy dinner rather than playing a musical instrument in a small tunnel that smelt of piss.
The thing was, she was a terrible harpist. He couldn't tell what the piece of music was that was being played, but it sounded awful.
She stopped playing. The other commuters applauded enthusiastically and a lot of them threw money on to the jacket spread out next to her. There were banknotes as well as coins.
What do I know? he thought.