I'll give them numbers so it is easier to respond:
1 (breakdown)
Yeah the only thing the upside down and the normal box have in common is their rhythm. I hope you started with 2 balls and not 3? Until we teach 2 large group of people the same trick through different methods, we can't tell for sure if it really helps to break down. However, I know from my own experience that I'll do better runs of 3b backcrosses if I do 1 minute of practising one side at a time and 1 minute of running it, than if I go for 2 minutes of just running the pattern. There are too many things going on which after all these years I still can not understand unless I break it down and correct errors one by one.
2 (muscle size)
Look up "best dart players" on google image.. all have big arms!
Of course all muscles are involved, but the roles of applying force and transferring force are assigned to different ones. In circus school anatomy class I was told that larger muscles can perform more accurate actions but I can't quickly find a source to back this up. Juggling will become a question of force. Try and run 5b non stop for half an hour, and see afterwards if you can still make it to half of your personal record.
4 (saggy balls)
Everything works, or doesn't work, depending on the goals. The saggy balls are just an example, you could name any prop for any other benefit. Obviously flashing 11 balls is going to be much harder with golf balls than it is with the bagladies finest number bags.
6 (holding time)
Same thing here. Things work or don't work depending to the "rules".
7 (clubs)
Motivation issues aside, I can't be convinced that people with no prior throwing and catching experience will ever be quicker to learn clubs. Juggling a cascade with balls was a challenge of 2 hours. With clubs 2 weeks.
8 (gravity)
again: You make up the rules! Wanna talk about juggling as this meaningless all-containing concept, or wanna talk about juggling as we know it? Yes, I've seen some great acts using hair driers to keep balls afloat, but it is completely irrelevant if you want to understand juggling better and you're just working on that 97531.
9 (size)
Hahaha, so involving helium is allowed but involving an audience not? In my definition of juggling, the audience is very very relevant. Juggling to me is a visual medium, anything I do has to be seen.
As always, it depends on the rules.
And since everything depends on the rules, there will never be an ultimate truth. Until god steps up and writes the bible and lawbook of juggling, we'll be free to do anything and call it whatever we like. For communication sake I have some boundaries to my concept of juggling, but I wont force them onto anyone else.
So, next up on our agenda:
Are there any truths in life?
by Daniel Simu, in response to this post 2016-04-14 00:52:35