[greymule]

If the batter takes the pitch, he should simply stand normally in the batter's box. You're right. He can't disappear. But he shouldn't do anything else, including duck.

If he swings, you'll know it when he moves so as to get in the catcher's way. You'll see it when he swings at an outside pitch and steps across the plate as if he couldn't help it. You'll see it when he acts as if his swing carried him forward, too. I batted a million times. How many times did my swing carry me out of the box? Zero. How about you?