The actor was filmed enjoying himself in the thick of it and footage emerged online showing Jason running into the crowd to join a growing circle pit.

On Sunday, the movie star was heard exclaiming: ‘These f***ers opened with ‘Whilplash’!”’ as he sprinted towards the action in a video released by Stereogum.

Getting to the venue early, the famous face was also in the crowd to watch their opening act Pantera perform live.

So here’s my proof —We got to Mosh/circle pit with Jason Mamoa inside the @Metallica Snake Pit 🥰I jumped in right after this. It was so much fun and Jason double high five’d me after Whiplash was done ☺️ pic.twitter.com/ggIpbbTXiW

— Krystal Djarin of Kryze (@donnatroy)August 29, 2023The star was spotted in the crowd at the show on Friday and Sunday (Picture: Getty Images)

Despite his joy at seeing the band bash out their tunes to a packed stadium, the star revealed on his Instagram he had initially planned to take his friend Travis Snyder along with his before he was hit with a medical emergency.

Making sure his ill friend didn’t miss out on the action, Jason FaceTimed his pal from backstage surrounded by members of the band.

Posting the clips to his Instagram account, the actor screenshotted their calls and showed Travis beaming from his hospital bed.

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He captioned his collection of images and videos with a message that read: ‘We had it all set up. I’m so thankful for everyone who made it possible for @thetravissnyder to see @metallica and @panteraofficial with @tommorello.

Metallica were performing at SoFi Stadium in Inglewood (Picture: Getty Image)

‘This was a dream for travis and Unfortunately we had some emergency for him last night but he’s good and healing.

‘Still needs your aloha and mana. But im so thankful for @metallica for connecting with him. You guys are the soundtrack to our lives. And mahalo for donating to Maui.

‘@allwithinmyhandsfoundation is epic please check it out. All my aloha j.’

Fans left notes of praise for the star in the comment section with one saying: ‘Jason your heart is bigger than you!! Love you for that! Travis sending love and light your way!’