Serious question, do other HNers browsers lock up anytime they view webgl demos? I was able to play around with this demo but after closing the tab Firefox went in to panic mode.
It threw an error that my video card (Radeon HD 3450) wasn't supported when I used firefox, but seemed to work fine in chrome. Maybe I need to enable some of the webgl options in about:config.
2011/05/05's Chrome Canary Build acted strangely. After I tried to view the demo, all areas for WebGL or any kind of plugin were able to be clicked-through (essentially holes in the application). It's fixed in 2011/05/07's (13.0.757.0) though.