Ambipedalism
Today I tried to train myself to descend with my right foot forward (crank horizontal). I've long noticed that I always have my left foot forward and that doing it the other way just feels really awkward. So I figured this would be a skill I could train myself to do, even if it never comes in handy or necessary... I had a long, familiar descent, so lots of practice time.
I just couldn't do it. When I forced myself to do it I was unable to do all the subtle weight shifting and handling moves that make me a confident descender. And when I let my reflexes take over, my left foot always wound up in front.
Has anyone else been able to learn this or do it naturally?