It's Olly vs Robbie as one guy takes to the gunge tank, while the other must battle his way through the gungy inflatable obstacle course, grabbing bean bags with his teeth and depositing them into the gunge pit below. At the end, he must slide down into the gunge pit himself to declare victory and pull the gunge lever on his opponent. If he fails within the 5 minute timer, he will have to face the gunge tank instead.