Designer Ramke's invention can power the rider to a height of 50 feet (15m), has a top speed of 30mph, and can travel almost 200 miles before it needs to be refuelled.
A floating pump powered by a 150 horsepower four-stroke engine sends water through a 140ft-long (43m) hose to a pair of nozzles mounted on the jet pack.
James Bond-style jetpack powered by high-pressure water invented - Telegraph