As the wired Helicopter A42 model could not easily be filmed right side up due to its spinning blades, it was upended and flown on wires attached to its underside; the footage was then horizontally flipped in post-production. The scene of Blue shooting Scarlet includes a reaction shot that required the brief appearance of a "grimacing" Scarlet head, which was sculpted especially for this episode.
The difficulty in filming the Helicopter A42 model right side up due to its spinning blades led to an unconventional approach: turning it upside down and flying it on wires attached to its underside. The resulting footage was then flipped horizontally in post-production. The scene of Blue shooting Scarlet includes a reaction shot that required a brief appearance of a "grimacing" Scarlet head, which was created especially for this episode.