I played a B
When a musician messes up and tries to say it was just a regular thing that happens to everyone.
'I played a B' he said, like it was the most common mistake in the world and no one had noticed.
'I played a B' she said, as if it was just a regular Tuesday for the band.
'I played a B' he said, as if the audience had heard it all before and it was just another day.