Carmakers face an eternally changing and demanding market. In the process they occasionally take side trips to the Land of the Odd for ideas about product specifications. What car had — or has — the weirdest feature included as standard equipment?

Most of the discussion about the Pagani Huayra has centered on the car's controversial looks, but it does not lack for more subtle eccentricities. Example: The car's "key" is a palm-sized aluminum sculpture of the car itself, which splits into two halves. The tail section plugs into the center console; you twist it to start the big turbocharged AMG-sourced V-12. The nose section is a USB drive to store music. The effect is a lighthearted counterpoint to a seriously fast machine.

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