The flame-shooting guitarist is Australian artist/musician Sean Hape (his father is Maori so his surname would be pronounced "hah-peh"), 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.
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.
Counting the opening voice-overs, and discounting any grunts, Max Rockatansky has exactly 52 lines.
When 78-year-old Melissa Jaffer was asked why she took a part in the film, she said, "When this role came along, I thought well, I won't get another chance like this before I die, and that's why I took it. It was absolutely wonderful."