> I hate to break it to you aspiring numbers jugglers, but no human will ever juggle 100 balls.

I hate it when the in first sentence author makes a categorical sentence and then half a page later cites "a - acceleration of gravity = 9.81 m/s^2" as if it's a some sort of fundamental constant :) .

Here is an example of juggling under simulated different gravity: https://blog.ted.com/athletic-machines-raffaello-dandrea-at-...