@Chlidonias I guess this is probably a joke (and not a bad one). That said, if I'm not mistaken this wallaby is actually eating a honey locust pod (Gleditsia triacanthos).
Until today I didn't even know animals could eat those, but I did a little bit of research and it seems the pods and leaves are indeed edible for some species of animals (although macropods weren't mentioned in the pages I saw).
You sometimes do see honey locusts at zoos, but not that often so I kind of thought they might be dangerous for animals.