Continuing with the ball

I have been busy animating balls. Trying to understand the physics involved on it, and using the animation principles to be able to replicate reality. I need to feel the weight of the ball just by playing with timing and spacing. Here is an example of that (The planning shows the thought process behind those animations):

And taking that even further is this obstacle course. For the first time using, squash/stretch and anticipation:

On this animations I have been using the layering method, animating the different axis of rotation and translation as different elements.