Riders react after making the steepest plunge on the Verruckt waterslide during its public opening at the Schlitterbahn Waterpark in Kansas City, Kansas July 10, 2014. The slide, at 168 feet 7 inches (51.38 metres), is the world?s tallest waterslide according to the Guinness World Records. It has had its opening postponed three times. REUTERS/Dave Kaup (UNITED STATES - Tags: SOCIETY)