During a concert in Austin , the popular American rock band Foo Fighters, vocalist Dave Grohl invited a fan on stage, whose face was painted by a member of the band Kiss. The guy picked up a guitar with a vocalist and played the song "Monkey Wrench" is not worse than the leader of the group! When the song came to an end, Grohl stood in front of him on his knees and bowed several times. Unknown at the time the young man added some of his signature solo, which the audience and musicians were thrilled...