@ D5..
If you look at my pic of the barbel that I caught you can see the shank of the hook, then the braid and then the carp head..
All that happens once you hook the fish, is that he spits out the carp head and that pulls the braid down the shank of the hook to the eye, so everything is out of his mouth..
Also the area where you insert the braid threw the fishes nostril is very boney so wont easily pull out or braeak up..
Plus if you take into account 45lbs braid times four..