Jazz pianist Dave Brubeck has died. Recordings of his snappy number Take Five have been flying around the Internet in the past two days, but I like this video even better. Brubeck is playing a small concert in Moscow, and obliges when asked to improvise on a Russian theme. But watch what happens — especially the surprised (and instantly delighted) look on Dave Brubeck’s face when he discovers that a member of the audience has begun playing along on violin. A joyful moment.