The Mel Brooks Star Wars send-up Spaceballs may be most memorable for its flying Winnebago, but a hovercraft also features in the hilarious action. Like a lot of movie prop vehicles, the hovercraft that carted Dark Helmet around had no power source of its own (other than a Napoleonic Rick Moranis in some scenes).
The Just a Car Guy blog found the hovercraft in the Justice Brothers Museum, and it turns out that after the movie, this prop became an honest-to-goodness working vehicle much like Lone Star became a prince at the end of the film. Originally built by famous customizer Dean Jeffries in just two weeks, the hovercraft now has a rear-mounted engine and can carry up to eight people in out-of-this-world style. Hit the link for the full story.