Nintendo will never, ever release Mario Kart on the PC. But the company can't stop fans making games that explore the series' inherent weirdness, and call their game Mario Cars 2: 64.
Made in a week by Chelsea Saunders, it takes a good, hard look at just what Mario Kart is: a bunch of Nintendo characters (and friends) doing something they don't normally do, for no good reason. And then they keep doing it. And then...
You can download the game from here, or if you're lazy (or at work), below is a playthrough by Nick Robinson.