If you're gonna get onstage and play Monkey Wrench with Foo Fighters - why not do it in full KISS makeup?

That must be what one fan was thinking before heading to a  Foo Fighters show in Austin, TX on 4/19/18 ... 

YAYO Sanchez caught the eye of Dave Grohl mid way through the show with his KISS make up and sign asking to play Monkey Wrench with the band ... and Mr. Sanchez pretty much killed it!  At one point - Dave loses his place and forgets the lyrics!  Check it out!