In case you’re wondering how this revolutionary personal flying machine works, wonder no more. The carbon-fibre JetLev is tethered via a flexible supply hose to a separate boat-like unit containing a sucktastic 4-stroke engine. This whooshes pressurised water into the jetpack, which then generates thrust by nozzle reaction force (whatever that is). It’s a bit like riding a pair of high-powered, easy-to-control fire hoses. Wahay!