At Holiday World in Santa Claus, Indiana, building the world's longest water roller-coaster-the Wildebeest-is like assembling an enormous, 3-D jigsaw puzzle. For host Sean Riley, this is one wild ride. The Wildebeest is fitted with special magnetic motors that enable the giant coaster carts to literally float on air. After assembling hundreds of meters of this water ride, moving the giant platforms and towers that support it, and securing enormous pieces of piping, it all comes down to a few critical centimeters as the team struggles to move the last massive pipes into place. With the ride fully assembled, some last-minute troubles threaten the Wildebeest's uphill climb. Will the Wildebeest be ready in time?