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The Coma-Doof Warrior's double-neck guitar, which is a playable instrument weighed 60 kgs and had to be held up with bungie ropes. The lower neck is a bass guitar neck. Both headstocks have automotive spark plugs as tuning keys. It shot actual flames from a valve behind the upper headstock. The flamethrower controller is the whammy bar (though during close-up shots the whammy bar isn't screwed in). A piece of a Datsun 1600 chassis hangs below the guitar body. A guitar pedal is chained to Coma's waist. It appears charred beyond recognition, though the shape and design resembles a generic BOSS four-knob pedal.
Over eighty percent of the effects seen in the film are practical effects, including stunts, make-up, and sets. CGI was used sparingly, mainly to enhance the Namibian landscape, remove stunt rigging, and for Imperator Furiosa's (Charlize Theron) left arm, which is a prosthetic limb.
The flame-shooting guitarist is Australian artist/musician Sean Hape, better known as Iota. In an interview on Vice (2013), he said the guitar weighed 132 pounds and shot real gas-powered flames, which he controlled using the whammy bar.
Margaret Sixel (Editor) is director George Miller's wife. When she asked why he thought she should take on this project, as she had never edited an action film before, Miller replied, "Because if a guy did it, it would look like every other action movie." Sixel's work paid off; she received an Academy Award for Best Editing.
In a Cannes press conference for the movie, Tom Hardy apologized to George Miller for the reportedly complicated relationship between the star and the director during filming. He stated: "There was no way, I mean, I have to apologize to you because I got frustrated. There was no way George could have explained what he could see in the sand when we were out there. Because of the due diligence that was required to make everything safe and so simple, what I saw was a relentless barrage of complexities, simplified for this fairly linear story. I knew he was brilliant, but I didn't know how brilliant until I saw it. So, my first reaction was 'Oh my god, I owe George an apology for being so myopic'." Charlize Theron mentioned similar experiences where she had no idea what she was filming, up to the point where she would ask the director what the hell he was doing. In the end, seeing the finished film greatly exceeded her expectations as well.