On a hot day like today what’s better than zipping down a waterslide? But we don’t know if we're brave enough to ride this slide.  The world's tallest water slide is gonna open tomorrow at the Schlitterbahn Water Park in Kansas City, Kansas, and it’s officially in the Guinness Book of World Records. It’s 17-stories high…that’s 168-feet tall. You ride on a raft and it goes 60 to 70 mph. The slide is called Verrückt, which means ``insane'' in German.