As the Foo Fighters were nearing the end of their festival set in Hungary on Tuesday night, the sight of a crowd-surfer in a wheelchair blew Dave Grohl away. Fan-shot video footage shows the frontman shouting, "He's the f***ing star of the show right there - that's the f***ing star of the show," before then inviting the guy to join the band on stage. After rocking out their final song, Grohl gives the man a hug, then hands over his guitar to let the guy smash it. Another audience member, a woman blowing bubbles, also got to hang on the drum riser with Taylor Hawkins as they played "Everlong". Who's the craziest character you've seen at a show?