On gorillas - with the exception of Chuck of course - no one is going to wrestle a gorilla into submission
The strength of a silverback gorilla has never been measured, but it should be sufficient to say that anecdotal evidence of animals observed almost casually bending and snapping objects such as tempered steel bars (2 inches thick) and giant bamboo stalks, suggest that the gorilla has the muscle power of between 8-15 men and possibly more. Jersey Zoos Jambo was observed to hang from one arm (he was over 400 lbs) while methodically ripping over 200 ft of inner ceiling planks from the roof of the new gorilla house with his other arm (the planks were securely screwed and nailed), simply because he didn't like them. No other animal outside of the great apes has such a combination of strength and dexterity. The fact that gorillas don't use their strength to attack other animals in the manner of chimpanzees or baboons means very little as they are by their very nature, peaceful animals. Gorillas also have one of the most powerful jaws of any animal, which they use to get to the piths of various trees and plants. They can also use them in defense, and can inflict serious wounds with their bites if they so wish.
Oh and a Kung-fu master couldn't even beat up a decent boxer in a straight fight so a lion would just eat him.