so im not good at them and honestly this is the most ive played with them, but ive got to say, you can get some pretty cool animations (i got some goofy ones though)
anyways enjoy (if you can or please to do so)
Vimeo: http://vimeo.com/23196612
http://www.youtube.com/watch?v=B4s8Oc6uAt0&hd=1