This would be the xxaxxmenu, but you have javascript turned off.
This text gets replaced by the swf file if the user has Flash installed.

The above Flash program is a partial demonstration of how a cloud chamber will track the movement of unseen particles.

It is also an experiment in handling huge numbers of internal components. There are 2400 elements making up the "cloud". Without special handling this number of active listeners would slow the system to a crawl. Hence the experiment.

Later I will make it a little prettier.