Tagged it arched back, but the anatomy is simply impossible.

impossible? shes part cat.

You mean shes part humanoid

ya but the rest is cat.

It looks like she was lying down and someone dropped knee-first on her and snapped her back >_>

(Cosplaying) Rin is in the middle of a somersault, and Chen is sitting in front of her at a low table (half-undressed). We can only see half of it.

Put THAT on your fridge and... uh, logic it.

Cats can bend in seemingly impossible ways...