Someone mentioned the Munstermobile, the macabre rumble-seat equipped car of the Munster family. Man, I bet this thing drove like crap. But, it's cool and I bet cruising this down your favorite road would make you feel like a movie star.
Another crazy creation by George Barris (Batmobile, Monkeemobile, Munstermobile, etc) was the mean machine from the bad 1977 movie, The Car. It was actually a 1971 Lincoln Mark III. I really like this thing.
Speaking of the Batmobile...I feel that this car reigns supreme in all of cardom. Produced from a 1955 Ford Futura concept car, the Batmobile was just too much for my adolescent mind. In reality, it weighed nearly 3 tons and was motivated by a pedestrian Ford 390 V8. That's OK...I'll keep pretending that it was the baddest car ever. Plus, it had parachutes.