Season 7 Episode 4 sets two new production records

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Last night’s episode broke a new record by setting the most people on fire in an entertainment production. In just one sequence there are 73 fire burns.
Emmy-winning stunt coordinator, Rowley Irlam, said. “No film or TV show has ever done that in a whole show, let alone in one sequence. We also set 20 people on fire at one time, which is also a record."
According to EW, the stuntman is covered with fire-resistant clothes, a cooling gel and a mask. Once they are set on fire, they have to hold their breathe until the shot is complete and the fire is extinguished — taking about 30 seconds.