A clever onlooker with a discreetly placed camera managed to capture this first video of the Ferrari SP12, a.k.a Eric Clapton's one-off $4.7 million Boxer tribute, in motion.

Eric Clapton loves Ferrari. Ferrari loves Eric Clapton (and his money). The result? This amazing and one-of-one possibly V12-powered custom Ferrari 458 Italia designed to look like the Ferrari 512 Boxer. It's called the Ferrari SP12 and it debuted last night at a chic London exotic car dealership. Here's what we know…