Even in the Animal Kingdom, BJJ reigns supreme.
Rener Gracie Breaks Down a fight in the animal kingdom vs. two Kangaroos. One Kangaroo uses "Kang-Fu", the other uses "Roo-Jitsu."
Daaaaaang.
Look for this 'roo to make his debut in the UFC soon. Dana is in talks with his manager/trainer.

If you don't know jiu jitsu, you don't have a chance in the animal kingdom.
The video will start queued up to the right time. Watch it!
http://www.youtube.com/watch?feature=player_detailpage&v=sCYLOQTEGhY#t=659&vq=hd720&w=740