Three years ago, the Foo Fighters were playing a show in the Swedish city of Gothenburg when Dave Grohl fell off the stage, breaking his leg mid-show. In an admirable display of toughness, he still finished the show, and then he played the rest of that tour while performing in a massive onstage throne. (Axl Rose later borrowed that same throne for a Guns N’ Roses tour after suffering a similar injury.) And last night, when the Foo Fighters returned to Gothenburg, they had something special in mind.