Wow, the comments here are overwhelmingly negative.
Keep in mind that this is from pouet.net, a site dedicated to Amiga-style demos. Of course this demo is irrelevant to modern web design. It's a technical feat more than anything.
Also, is it me or do these effects look awful? No antialiasing on my machine, lame Amiga era pseudo 3D effects and blurry type in a tiny screen resolution.
Wait, a browser plugin can crash your whole operating system? Or do you mean your browser crashed? (Both don't exactly inspire confidence in the Mac platform)
I just watched it in Firefox on Linux and apart from a quite long time of pre-rendering and high memory consumption, I liked it. The bloom particle effects look like Auditorium (http://www.playauditorium.com/), but it's pretty nonetheless.
Keep in mind that this is from pouet.net, a site dedicated to Amiga-style demos. Of course this demo is irrelevant to modern web design. It's a technical feat more than anything.