I couldn't sleep so I started digging through all my old projects scattered around my laptop
I stumbled upon an 'ancient' framework I did based on a modified irrlicht engine (not sure which irrlicht version, should look that up) which basically is the ancestor of my current irrlicht prototyping framework
This thing still used havok for physics
![Image](http://img818.imageshack.us/img818/5218/irrlichthavok.jpg)
This is a vortex simulation done in havok, I could spawn massive amounts of random meshes with actually pretty awesome performance
The codebase itself was a huge mess though, I don't think any code from this thing actually survived in the latest framework
EDIT:
Fun fact: I always gave the random meshes a rather large mass which resulted in some serious ass-kicking if you went too close to the vortex
This demo literally beat the sh*t out of you