the ultimate costume

I think today should be devoted to finding the ultimate Halloween costume (past or present). I know there will be some gems this year but given the popularity of Flickr and just the internet in general, I suspect we could find some fairly mindblowing costumes. For instance, check out this Yeti costume. Awkward? Yes. So over the top that it's mindblowingly good? Absolutely. Or what about transforming yourself into a AT-AT Walker from Star Wars. Never seen that before but I'm glad I have now. What else has everyone else unearthed?