Vladimir Horowitz, here in his 80s, demonstrates an impossible command over his instrument of choice, the piano. The impish ending to this piece infuriated his fellow concert pianists. The ever-childish Horowitz was shoving his prowess in their face: Nah, nah, nah, I can do this and you can't!
And he was right.
UPDATE: Here's an even better version, and quite different. With romantics like Horowitz, every performance had to be unique.