wondering the mechanism of how a grappling hook would be able grip onto most surfaces without missing the hit or sliding off.
in video games grappling hooks are ropes or chains which when thrown onto anything they always 100% grip it strongly and are able to hold the weight of the person either for climbing walls, mountains and trees or for pulling enemies one onto the other and smashing them.
The part of hooking correctly 100% of the time seems kind of improbable, specially onto flat surfaces.
that's why the idea of an animal, robust one which can be trained came to mind.
so the question raises, is it realistic to make an animal which can bite through rock and hold the grip with their jaws realistic?