John has a button on his forehead with the words "free will" written on it. It's a bit like Woody's string in Toy Story that causes him to say "reach for the sky" when you pull it. If you push John's free will button he says something like, "How quaint! The 'free will' noise. What on earth does this noise represent?" You can try a few other buttons too, like the one with "god" written on it. That's fun to push too.