How many times would you like me to repeat myself, badluckjr? Is there a different wording that I can use to help you?
You see the ball coming, you're in position to field it(very much unlike a pitcher who just completed his motion), you know there's a chance of an awkward hop(your brain does even if you consciously do not), yet, when it does change trajectory, you can't turn your head ever so slightly to keep from taking it square in the face. That makes sense to you?
Think of a fight. Why didn't every punch, thrown with bad intentions by Mike Tyson, landed on the face knock his opponent on his ***? Because they were moving their head ever so slightly to make it a glancing blow as opposed to a direct one.