Remember that time Dave Grohl plucked a bloke from the crowd at the Fooies' Brisbane gig back in January and got him on stage to perform Monkey Wrench?
Well the frontman was back at it again at a recent show in Austin, Texas, spotting a guy in full KISS make-up and holding a sign that said "Monkey Wrench" in the audience.
Yayo Sanchez, who Grohl immediately dubbed "KISS Guy", seemed to have spent his entire life preparing for this very moment; after jumping on stage with his own guitar pick, Sanchez promptly grabbed a guitar and just went for it.
We're talking running from one side of the stage to the other, headbanging harder than Grohl himself and chucking in a couple of windmills just because.
But it was Sanchez's absolutely insane guitar solo that rendered Grohl speechless - literally.
Check out the moment the Foo Fighters legend forgot the lyrics to arguably the band's biggest hit and just lost it.
On a Fooies buzz now? Listen to the Foo Fighters' best interview ever with our own Jane Kennedy, below.