In upholstery circles a 'bag of walnuts' is the term for a chair that's badly stuffed. For a while now I've been trying to make some chairs that look badly upholstered but are in fact comfortable and complicated to make. Here are a few:
You may wonder why the hell anyone would want to make something like this. If this is the case I can't really give you a useful answer but I can say that it's mainly in the 'spirit of experimentation'.
Hope that clears it up for you.