 The final fight with the Ducky Boys was absolutely wild , [ and ] for all practical purposes it was real . For an entire week hundreds of screaming , stunted madmen — armed with real baseball bats , axe handles , and chains — hurled themselves at us in wave after wave of unabated Celtic fury . It got totally out of hand , with the mayhem sometimes continuing for a full five minutes after [ the director ] yelled cut . Some of the actors and camera crew were seriously injured and had to be hospitalized . " 
