This video is the result of a collaboration by Lithuanian conductor, composer and music educator Mindaugas Piečaitis, Philadelphia musicians and artists Betsy Alexander and Burnell Yow, and a wonderful cat named Nora. It was premiered in June of 2009 by the Klaipėda Chamber Orchestra.
Piečaitis evidently wrote the orchestral score after contacting Alexander and Yow to obtain video of their cat, Nora, who taught herself to play after watching Alexander teach the instrument for a year.
A hearty thanks and a virtual finder's fee goes out to Jerry Coyne at Why Evolution Is True.
I'd like to think I might have done something like this had I continued my studies in music composition.