A meeting of rock giants past and present came together this week when Royal Blood were joined live on stage by Metallica's Lars Ulrich. Check out footage from the show below.
The chart-topping Brighton rock duo were performing at Slim Jim's in San Francisco on Wednesday (15 April), when hometown hero and drumming legend Ulrich appeared on stage and took over duties behind the kit for the band's huge single 'Out Of The Black'.
Meanwhile, drummer Ben Thatcher used the opportunity to stage-dive and crowdsurf.
Watch footage of the performance below
This isn't the first time they've come together. Back in October when playing San Francisco, their show was watched by Muse, Tom Morello and Ulrich - before the latter took them to Mrs Doubtfire's house. The band posted the abovepicture to their facebook page explaining that Metallica drummer Lars Ulrich took them to Mrs Doubtfire's house after the show (we don't know why, but it's pretty awesome).
Meanwhile, Royal Blood's next major UK appearance will be at Reading and Leeds festival. For tickets and information, visit here.