I'm working on a story, and I am trying to decide between two different modes of transportation. Hoverboards: Thin, boards of metal like material that go fast and make a cool whizzing sound as you go buy. They're shiny. But you have to stand, pretty much all the time on the hoverboard. OR Winged Feet: They look like this: They're retractable, but they don't go as fast (close, but not quite.) Also, they allow you to sleep while floating.