In a moment that has since gone viral, Jason Momoa shocked fans by climbing over the barricade and diving headfirst into the crowd.

Jason Momoa went all out during Black Sabbath's farewell show. Along with hosting this historic day of heavy metal, he immersed himself in the experience like a regular fan alongsi

The monumental farewell event, titled Back To The Beginning, was held Saturday night (July 5) at Villa Park in Birmingham — the legendary heavy metal band’s hometown. It marked the last time founding members Ozzy Osbourne, Tony Iommi, Geezer Butler, and Bill Ward would share the stage, performing together for the first time since 2005.

After making his impressive Sabbath debut on The Eternal Idol, Tony Martin upped the ante on Headless Cross, helping to deliver the metal legends' best album outside of the Ozzy and Dio staples. His sky-high vocals evoke his elfin predecessor on the album's epic, hard-charging title track.

Find our complete coverage of Black Sabbath’s “Back to the Beginning” concert here. > Jason Momoa joined the pit for Pantera’s set at #BackToTheBeginning @BlackSabbath pic.twitter.com/Wutfxoouwa

Actor Jason Momoa stepped away from his hosting gig at "Back to the Beginning" and joined a circle pit while Pantera played.