Having volunteered at an ape rescue centre, I've heard some horrific stories about what happens when a chimp fights a person. Example scenarios include people who keep chimps as pets and zoo keepers who don't close a door correctly. Example injuries to the humans include fingers and other parts being bitten off, or being blinded. A worst case scenario for a zoo involves a group of chimps getting out and then getting frightened, and fighting.
Of course a gun will solve this problem, hence my comment about 'baseline'. Perhaps I should have said 'unaugmented'.