Episode four of The Amazing Race Australia versus New Zealand brought with it a bucket load of tension and squabbling, as teams rushed on to Windhoek, Namibia. The scenery might have been awe inducing, but the heat got to some contestants. Charged with escorting two baboons down a path through a wildlife sanctuary, John and Murray had a cheeky word or two for Emily as she did the task with ease, her brother Jono taking offense to the mockery. Tensions erupted in the Kiwi camp, with John warning Jono if he came near him, things would get physical.