That would mean every man that has been attacked by a woman who slashed them to death or beat them in the head with a hammer would all be able to disarm the woman first. Women are perfectly capable of murdering larger men. She had him at his most vulnerable where everything on his naked body could be a target. He was in a small confined space.
Only a fool rushes forward into a crazy woman who is wielding a large and sharp 6 inch blade knife.
All he could do is try to desperately get away from her but like many other men he was unsuccessful.
The ME would have seen the signs of a stun gun.
IMO