I have watched Wicked Twister all season long, and have not seen the train get anywhere near the top of the upright towers. There is still on the average ten feet left before it hits the bumpers, which equates to another half rotation or so. I know it will never hit the bumper, but it should get closer. Other Impulses (I will not mention their names because of my loyalty to CP) have reached their max heights, nearly bumping the bumper on the up tower. Why can't Wicked Twister do the same?