Ralph Gilles, head of design at Fiat Chrysler, is a hardcore car enthusiast, and one of the Dodge Viper's greatest champions. He owns a wickedly sinister all-black Viper ACR, dubbed Voodoo, that he brings to track days all over the continent. YouTube channel captured Gilles and his ACR tearing around Canadian Tire Motorsport Park outside Toronto, and it's a fun watch.
From what we can see in this video, Gilles takes his track days seriously. Even though he has to deal with all sorts of traffic, Gilles is still recording his lap times with a GPS telemetry device mounted to the windshield. At one point, he muscles his way around a modified C6 Corvette, which you have to imagine was pretty satisfying.
It's also worth noting that the Viper ACR isn't a car for track-day novices. It's seriously quick, but it takes a lot of skill to get the most from it. Gilles demonstrates here that he clearly knows what he's doing.
For more track-day fun with Gilles, check out this video of him hassling a CTS-V Wagon in a Challenger Hellcat.