What’s The Craziest One-Off Ever Built?S

McLaren just unveiled their new X-1 concept, which covers up an MP4-12C with custom bodywork (including wheel spats) inspired by none other than the Citroën SM. It's pretty out there, but certainly there have been stranger one-offs.

We have to pick the Ferrari Modulo of 1970. It's one of Pininfarina's greats, designed to be as low as possible, not unlike Bertone's also-bonkers Stratos Zero. Hand anyone else a Ferrari 512 racing chassis and they'd try and make something elegant and beautiful. The Modulo just wanted to blow your mind.

Whether it came from a pre-war coachbuilder, a 1960s Big Daddy Roth-wannabe, or an unhinged carmaker, what's the craziest one-off car you've ever seen? Remember it has to have been built, it has to have run, and there can't have been more than one made.

(QOTD is your chance to address the day's most pressing automotive questions and to experience the opinions of the insightful insiders, practicing pundits, and gleeful gearheads that make up the Jalopnik commentariat. If you've got a suggestion for a good Question of the Day, send an email to tips at jalopnik dot com.)

Photo Credit: Pininfarina