Here are two amazing videos.
First, a rubik’s cube solved in about 20 seconds (1.4 MB file — do not try this without a specially modified “Speed Cube”). If that bit of nostagia gets you hungry for more you should check out the whole SpeedCubing site where they give you techniques to solve any cube quickly.
The other is this video from the Japan Tetris finals (13 MB). Watch in amazement at super-human Tetris playing! (But, has the video been sped up?)