I wanted a change of pace from cars, so I had a flashback of a 1971 Emerson, Lake, and Palmer TARKUS album cover. I used this as an inspiration. This was totally scratch built using balsa, plastic, aluminum sheet stock, card stock, leather, paper, a couple hundred rivits, some other odds and ends, and some mushrooms. Cover your ears!
http://www.danmeth.com/Weirdness/elp%20tarkus.jpg