Last month, Dave Grohl fractured his leg after falling off the stage at a Foo Fighters concert in Gothenburg, Sweden. After canceling a string of European dates, the band returned to business in Washington, D.C. this weekend, where Grohl performed from a giant light-up throne while wearing a purple leg cast. As Consequence of Sound reports, new footage from the concert illuminates the throne's backstory. Grohl explains that he drew the blueprint while high on morphine and oxycontin in hospital–that's his picture below.

Watch Grohl tell the story of his broken leg: