Wikipedia
The Fishpipe is an amusement ride consisting of an inflated, rugby ball shaped, transparent, two skinned ball suspended between two large wheels on a frame. Up to 3 people can enter the ball, water is added and the entire ball is spun in place at speeds up to 11 feet per minute. The Fishpipe riders slide (or can attempt to surf) on the inner surface which is made slippery due to the water.
The Fishpipe was created in New Zealand by the same people who created the original Zorb and OGO balls. There are only 12 Fishpipes in existence on the planet, 2 are on the island of Maui, HI and 3 are in the southern area of mainland United States. The speed can be controlled for each rider and 15 gallons of clean filtered water is put in the ball for every rider.
The Fishpipe has been described as the world's longest waterslide, with the occupants sliding around , and by Canada's Daily Planet (TV series) "Garage Gurus" show as 'the world's most compact waterpark'.