It’s no secret that the Foo Fighters bring fans up on stage to shred with Dave Grohl and company. From time to time, there are some who blow our minds. This time? Dave Grohl’s mind was blown. First he was ecstatic that the fan brought his own pick, but about two minutes in, the fan dubbed “KISS Guy” kills the solo, causing Dave to get so excited he forgets the lyrics to “Monkey Wrench”. Check it out!