Batuhan Bozkurt wrote a great blog entry about recreating the THX "Deep Note" with Supercollider awhile back. So I tried it in Pd. Then I lost the patch. Then I tried recreating it from memory, and upped the ante with some visuals :)
http://www.youtube.com/watch?v=ESi7ub8AVPs
(Unfortunately the a and v don't sync up so well, but you can get the general idea)
-Jonathan