Very interesting. This explains why rock climbers move their arms around to depict the moves when they try to describe a route to someone else. They're just replaying the script!
Very interesting, as it applies not only to climbing, but to so many other activities that I do with rather little conscious thought, such as playing the piano.
One thing is quite clear to me now, though. My golf swing must not be scripted, since I can never predict where the ball will end up!