Hey, this story is about "Metal" but not heavy metal. It's about the famous industrial/post-punk song by Gary Numan. You see, Nine Inch Nails were very influenced by Numan and developed quite a friendship with him over the years, and so they invited him up to play with them at a June 16th show at The Joint in Las Vegas, NV.
Today, the band have made official footage of the performance available and it's pretty solid.