I did this little test of unicycle motion just for fun. I've marked it up with some notes.
attachment=46990:unicycleMotionH264.mov
attachment=46991:UniCycle.prj
Although I mention it in the notes, I'll say it again... the unicycle's "stop" is the least satisfying in appearance because it has been over simplified. A real unicycle stop is a precarious balancing act.
Edit: couldn't let that lousy stop be. I added some overshoot to it to make it look better. Revised files.
UniCycle2_with_reversestop.prj
unicycleMotion2NotesH264.mov
Edit 2:
Playing with this notion some more, here it is with "cartoon physics". This is all bone squetch. Distortion box squetch would be better, especially on the wheel, but that's a battle for another day.
unicycleMotion7H264.mov
Unicycle7_cartoonier.zip