sentences:  He is also attributed with introducing Jet Ski watercraft to Australia, New Zealand and Europe where he became the first European Champion in closed course competition.During a speedway hiatus, he also competed as an American Expert Jet Ski racer and was ranked #4 in the World while racing underpowered craft.Cook continued to ride well into his 40s and almost qualified for the Speedway Grand PrixSeries for 2002, only failing at the 2001 Intercontinental Final stage.