One hot morning, Grug decides to go to the creek for a swim. On his way there, he spots a strange creature lying on a rock. It looks like a disaur! The disaur chases Grug to the creek, and it follows him. Grug swims across the creek, and so does the disaur. Grug sits down for a rest under a tree. But where has the disaur gone? Then something falls on Grug's head. It's the disaur! Grug runs, with the disaur clinging to him. Grug trips over Cara's hollow log, and the disaur flies off Grug. Cara comes out to see what's happening. Grug and Cara look at the disaur. The disaur looks at them. Then it slithers off into the bush. Cara sighs. 'Just a goanna,' she says.