With free Mac OS X screensaver Fenêtres Volantes (Flying windows) your windows take off flying and fluttering in the void. On a mouse move, the windows immediately come back and stuck to their original position.

Fenêtres Volantes allows users to set the speed, the number of windows to take in account, as well as multiscreen behavior.

System requirements:
MacOS X 10.4.6 Tiger or above
G4, G5, Intel – 1GHz or above

More info and download link for the free beta of Fenêtres Volantes here.

[Thanks to MacDailyNews Reader "The Other Steve" who found the link via Digg for the heads up.]