Here's my bouncing ball, bowling ball, balloon and pendulum, all in one big happy AVI file:
Self critique: Ball bounces a little fast, bowling ball kinda jitters near the end, I like my balloon, pendulum is off center but whatever. Overall I'm quite happy with how this turned out.
Also, very important discovery, I do not hate drawing the same thing over and over. I'm actually quite content doing this because I always feel like I'm getting somewhere as I complete each frame. May be premature to say this this early, but that's how I feel at the moment.