I carried on with a few ideas of what to do with the ragdoll version of my Evolver avatar and I ended up with this interesting behaviour. Which is sort of where I was heading. It is a form of emergent behaviour caused but the avatar being suspended by the two top spheres using a form of hinge. This combined with gravity and the bones and joints in the avatar lead it to create this dancing toy effect that is different each time it is run. Next is to wire the strings up to touch controls and then I have a full dancing avatar to play with on the iphone.