Itakio
Smash Journeyman
http://www.youtube.com/watch?v=npHX8BkXYCI
There seems to be some sort of technique to quickly changing your momentum used in this video. I don't know anything about it so far but I hadn't seen it posted yet so I thought I would point it out.
Update -
There seems to be some sort of technique to quickly changing your momentum used in this video. I don't know anything about it so far but I hadn't seen it posted yet so I thought I would point it out.
Update -
To do a midair momentum pivot you have to be in the air and moving in one direction. From there push B first then quickly (and I MEAN QUICKLY) tilt the control stick in the opposite direction and you can do this at any time in the air.
In case there are any doubters, Nimkip is correct.