Metallica’s “Spit Out the Bone” is the heaviest track on their latest album Hardwired…To Self-Destruct, and possibly their heaviest song in over 25 years. Recently, the band was generous enough to give us a behind-the-scenes look of the recording process. As you watch the fifteen-minute video, there will be parts when you end up asking yourself, “where’s Kirk Hammett?” Don’t be alarmed, he’s there and you see him saying, “I have a lot of energy.”

Check out the full process below: