I don't know if any of you ever saw this website before, but it has some amazing animations of mechanical movements.
After an animation has ended you can completely rotate it with the left mousebutton and zoom in and out with the right mousebutton. If you click on parts with the left mousebutton you can take the movement apart.
(I believe it only works in Internet Explorer)
P.S. I know that this is not the right forum to post this message, but I didn't know where else to put it. If a moderator would be so kind to correctly categorize this post?...)