The only thing that makes me think Gorilla is the history of monkey baiting.
You stick a pit bull and a monkey in a pit, who do you think wins? The monkey kicks the shit out of the dog 9 times out of 10. They jump up on the dog's back and beat their skulls in.
Lions are bigger than dogs, but gorillas are pretty huge, too. I don't know if they're agile enough, though.