The most underrated pinball feature is the KNOCK that goes off when you hit the FREE GAME HIGH SCORE. Its always in the middle of a game that your rocking it and IMO this is the pinnacle of pinball. Its like the cheerleader in the pin when you on your way to racking up a super high score and then that knocker just goes SMACK out of no where. When one of the little one are playing and it happens they always go nuts. That is perfection for me.