Blood, sweat, brawl and good humour! Unofficial fifth member of the legendary Big Four, the virulent Californian quintet shows no sign of slowing down, delivering fast and aggressive song and smacking people as if its final hour has arrived. And it’s been going on for over 40 years! That band is acclaimed by the Union of Dentists, the Association of Physiotherapists and the whole plastering industry. National Health Service is less of a fan…