Dan Mumm's interpretation of the first movement (Allegro 1) of Johann Sebastian Bach's Harpsichord Concerto No 1, BWV 1052. Totally cool. Anyone who's listened to Bach for any length of time knows that rhythm is a big part of his music: you can dance to it, both vertically and horizontally, and obviously you can rock out to it.
Also, check out Helene Grimaud's very powerful, and equally rocking, performance on pianoforte of the same concerto, here.
Have a great New Year's Eve, wherever you happen to be!