Dogs vs Crocodile
As you know, the crocodile is one of the world's greatest predators, and is not often beaten. This picture, however, shows what a coordinated pack of lesser animals can do. Notice the apparently planned attack where one of the dogs holds the crocs snout shut so it can't breathe, while another holds the animals tail so it can't use it to sweep the attackers away, while, finally, the third dog attacks the soft underbelly of the formerly unbeatable predator.
This picture is not for the squeamish (scroll down)