If you're not familiar with Sumotori Dreams, it's the funniest thing that ever happened to procedual animation. Proof here (loud cackling and some profanity in the audio track, could not find any that did not have lots of hilarity and shouting):
If you're at all interested in procedural animation - or have even a tiny sliver of a sense of humor - you should buy the iPhone app the android app, or the PC version. This guys deserves our support!
On a related note, if you like this you may find this talk from the developer of Overgrowth interesting as well.