Volumetric Particle Flow
I've no idea what all you folks are using, but in my hands (linux amd64 i5 8Gb debian/jessie) this is a very impressive website in that it straight-out crashes firefox/iceweasel (31.1), stymies firefox nightly (35.0a1), and leaves google-chrome (37.0.2062) declaring that it couldn't be loaded.  (just a theory:  i'm running nouveau on my nvidia, as the last blob wouldn't compile)