Earlier this year, Audi released a 2 wheel, concept vehicle – the Audi e-Bike. Built with a carbon fiber frame and a 2.3kW electric motor, the bike weighs in at under 25lbs. Which is extremel... not sure where one would sit though.
This paper aeroplane currently holds the world record for a hand launch. It stayed aloft for a full 26 seconds. Time it when next you make your favourite paper dart - time yours and see how long it remains aloft. This one is piss easy to make and flys best in still air and should be thrown straight up, as high as you can get it.