Danmaku (japanese : 弾幕) are shoot-them-up games where enemies fire at you loads of bullets. Screen can be filled with them, and playing such games requires great skills.

I just found a Gosu playing two players at the same time with his two hands.

As seen on Geektube.fr

It’s quite old, but it was a very interesting and disturbing idea : Virgin organized an art contest where submited artworks would be seen by more than 2.1 milion people from 26 different places.
A contest for the design of sickbacks. (Be sure to look at the gallery, some artwork are utterly good)

If you’re using the 1.2 beta of CakePHP framework and played a bit with Ajax, you may have encountered that problem. For the impatient folks, one way to fix it is to set the security settings to medium (you may put that in your config/core.php) :

// Ask CakePHP to be less picky about security
// notably [...]