I have to say, the art of Arthur Ganson is some of the most amazing stuff I've seen in a long time.
" Self-described as a cross between a mechanical engineer and
a choreographer, Ganson creates contraptions composed of a range
of materials from delicate wire to welded steel and concrete."
This is some truely amazing kenetic art. This page off of Ebaum's World has quite a few videos of his art. Be sure to check out the one of the walking wishbone. The PBS website also has
5 minutes of clips from the DVD.