Juggling for Seniors
Once upon a time I had a modest (OK, VERY modest) skill at juggling. So, not having done any juggling for a few years or decades or something, I decided to see if my old muscles, reflexes, and fading vision could still handle it. Three balls, check. Four beanbags - not so hot, managed 11 consecutive catches, while minimum proficiency is supposed to be twenty, but not bad considering that I never was any good at it. Three clubs is probably the minimum skill that is amusing to watch, and I used to be able to do it pretty easily, even managing a few simple tricks.
This seems to be a major challenge for my own personal beanbag - the fixed one, between my shoulders, I mean. So far, I just haven't been able to manage the air traffic control. The problem is that I just can't seem to stay in the basin of stability, and my pattern quickly become chaotic. This is a familiar pattern in control theory - either the sensors aren't up to the task or the actuators aren't.
But I haven't given up. Yet.