African ElephantvsSilverback Gorilla

This is a complete mismatch. The elephant outweighs the gorilla by roughly 35:1. A silverback gorilla, despite its impressive strength, is physically incapable of damaging an adult African elephant in any meaningful way.

The elephant could end this by simply walking into the gorilla. Its tusks, trunk, and feet are all lethal weapons against something the size of the gorilla. Even the gorilla's legendary grip strength — capable of crushing coconuts and bending steel bars — is irrelevant against an animal with legs thicker than tree trunks.

In the wild, gorillas share habitat with forest elephants (smaller than African bush elephants) and give them a wide berth. There's a clear and obvious hierarchy here.