Originally Posted by Dirtbike
There is some Japan imported hub that coasts when you ride backwards or forwards, but you can still pedal forwards. I have no idea how it works, but its really cool. There is a BMX guy that lives by me and he has one on his bike. BTW, he is insaneley good.
All I know is that it is red, and has Japanese characters written on it.
That would be a Nankai freecoaster; they have a variety of different models. Odyssey and Sym, among other companies, also make them.