The good guys always shoot the bad guys in the hand.
That’s why there used to be so many guys called Lefty.
I’ve seen it happen three times in real life. The weapon is in the perps hand. That’s where the eye gets fixated. Where the eye is focused the bullet tends to go.
It was amusing in one case. The perp reached for the gun which was in his waistband right above his crotch. Three rounds fired, two by one cop and one by another. Tight grouping at about five to seven feet. One through the thigh, one in the scrotum, one right through...
He lived. Much to his regret.
He should have been able to shoot the knife out of her hand, just like in the movies.