jet pack

Something everyone could only wish s/he had, to get to and from work, school, shopping etc. and not have to deal with cars, buses, trains, ferries, etc. Basically a rucksack-like contraption that one straps on to the back and has canisters for fuel. Not aerodynamically efficient, makes a lot of noise, to say nothing of the fact that one would have to get a pilot's license to operate it, obey new laws restricting where and when to fly with it, and of course there are the price and fear factor one would have to deal with. Not a very good idea, when all is said and done!