"T o d d P a t t i s t" wrote in message
...
I'm a flight instructor, too, and I don't think I can detect
steady 1/4 ball out, but I *can* detect when we're
coordinated and the student suddenly uses inappropriate
rudder, either too much or too little. It's much easier to
detect changes than to detect where the ball is. [...]

It's almost as if your body is especially good at detecting acceleration or
something.