For this exercise, I tweaked the squetch ball to make an exercise ball (about 30 inches in diameter). For the surface material, I used one of the plastic materials made by John F. Ashton-Keller (I have reposted them in the forum here) called "FernPl.mat".
I used this video as a reference to determine the bounciness of the exercise ball.
Here is the onion-skin of the initial drop without squash and stretch (24 frames per second):
The shaded wireframe animation of the bounces without squash and stretch (24 frames per second):
I then added four more contact frames for each ball bounce and squash and stretch similar to the 02 exercise.
Here is the Timeline for the height of the ball showing the added contact frames:
Here is the onion-skin of the initial drop to the first contact frame with squash and stretch (24 frames per second):
The shaded wireframe animation of the bounces with squash and stretch (24 frames per second):
The final render animation of the bounces with squash and stretch (24 frames per second):
