This bush-like shape has been generated by a process called "diffusion limited aggregation".
Since all branches are the same thickness, it is ver flexible. When you order it in a dyed finish, Shapeways may ask you if you want it polished despite being fragile. You should answer "no" because polishing does not really improve this model and you risk breaking it. I have also a version where the branches get thicker the more stuff they support,
here. It is sturdier and does not bend as much.