Flash
Solar system - This shows the rotation directions and approximate rotational speeds of earth and moon, as it would be seen looking down on the earth's north pole. The elliptical path is not shown, and the distances are not to scale. The animation starts January 1, 2007; phases of the moon are probably pretty accurate for 2007. If the animation doesn't start, try re-loading. Use up and down arrow keys to speed it up, left and right to go backwards or forwards.
Flock of birds - position of the mouse cursor affects flight patterns.
Running: comparison of 100 meter times (regarding
Usain Bolt, august 2009)
comparison of running speed for different distances
Experimental: collisions - smoke (position of mouse cursor affect drift) - vortex