leb writes: "Engineers in Japan are developing trains that really do fly. Using the 'wing-in-ground' (WIG) effect, in which a high-pressure cushion of air forms underneath flying objects as they approach the ground, they believe they will be able to create trains that use only a quarter of the power required for magnetically levitated (maglev) trains. Read about it in this New Scientist article." This is rather nifty, but it isn't as cool as the flying train at the end of BTTF III. Put a flux capacitor on this baby, and we'll talk.