Bounce That Ball

We have bounced a circle in Flash, lets get serious and make it real, click this link to a great little tutorial on how to achieve that:

The bouncing ball includes many aspects of animation that an animator uses everyday in every scene on which he works. Animation principles such as the path
of action, arcs, momentum, timing, key drawings, inbetween drawings, weight, speed, and the substance of an object are included in this simple exercise.