There was Mithril, chewing on my right ankle and looking very unhappy.
I shoved her away and resumed playing. Back she came, to gnaw on my ankle. Shove. Play. Gnaw. Repeat cycle for a while. Eventually she gave up and just lurked behind me, still looking unhappy. I vocally ministrated with her to just go into another room if she disliked the sound so much, and eventually she did.
Meerkat's hypothesis was that the violin sounded like a sick/hurt cat, and she was trying to help. In any case, it was both miserably pathetic and horribly funny.