Fun fact: the standard advice for if a dog, cat, or human bites your hand, is to feed the bite. Push your hand further into their mouth, forcing the jaw open.
Nurses, EMTs, veterinarians, etc are taught to respond this
The advice for a human biting you is to jam your hand or arm deeper into their mouth, and rub the spot under their nose back and forth.
If you attempt to remove your hand, or forearm, the teeth do what they're supposed to and gouge out a chunk.
This vicious wolf attack illustrates proper technique.
So: every EMT and nurse who gets bitten by a human, is trained to jam their hand or forearm deeper into the mouth, feeding the bite so the jaw widens enough to remove the limb
Also, every redneck learns this along with the advice of "never run from an angry dog"