When I coached High School softball, I had the chance to take my pitcher to a clinic run by Joyce, so I got to see her up close. Her windmill style allowed her to rub the ball against her thigh during delivery, affecting the spin. Joyce was able to make the ball break four different ways, up or down, in or out. Given that you had to start your swing as soon as possible, you literally had no chance against her. But again, I would be curious to know how an experienced male softball hitter would do against her.