At a recent battle of the bands, heavy metal guitarist Navid Chohan started shaking his head so violently onstage it looked like he was going to hurt himself. Soon his entire face was lost in waves of his shoulder-length hair.
I have a confession. As a music style, heavy metal has completely passed me by. I don't understand it. I'm not even sure I want to. "Bring your daughter to the slaughter," bellows Iron Maiden's Bruce Dickinson. Why would I want to do that? Why would I want to listen to anyone even suggesting I do that?
It has fed the dreams of millions of air guitarists, headbangers and rocker wannabes. It has exposed a new generation of fans to classic rock and metal while helping the slumping record industry boost sales.
They have been described by critics as the definitive heavy metal band, they released eight studio albums in just 10 years and have sold more than 300 million records worldwide. And now, one of the best rock acts of all time is back.
What do you do after fronting one of the world's biggest metal bands? Settle down and live a quiet life? Continue claiming that you are the cutting edge of music, even though you've only been releasing greatest hits records for the last ten years? Not if you're Bruce Dickinson.
Swedish filmmaker Jonas Åkerlund is known for his hard-hitting, frenetic and often violent takes on the darker side of humanity. The world's most controversial music video director, he has worked with the biggest names in the industry.