Here's why you'd want an army of kangaroos. Because the only people who can take on kangaroos are Australians. And not all of us, just the big, gruff, hairy ones, the ones who live out beyond the black stump, who's livelihood involves herding livestock, poisoning rabbits and punching kangaroos. There's not many of those guys left. Their kids all moved to the cities and turned soft. You genetically engineer up an army of kangaroos and you'll be nigh on unstoppable... until you try to take over the vast, desolate stretches of the Outback.