At a recent stop in L.A. on their farewell tour, Nine Inch Nails were joined onstage by electronic music pioneer Gary Numan as they covered Numan's "Cars" and "Metal." Nine Inch Nails took Numan's electronic throb to it's industrial and harder-hitting conclusion, so the pairing makes a lot of sense. "Cars" is above, "Metal" is below. [You Ain't No Picasso]