 As director Rob Bowman was dissatisfied with the first take of Skinner shoving X against the elevator wall, Mitch Pileggi and Steven Williams decided to do the stunt for real, and Pileggi did it with so much strength that it broke the back of the elevator scenery.Williams' background in fight choreography, stemming from his role in "", allowed him to help in choreographing the brawl.One hundred and forty tons of snow and ice were trucked into a soundstage to create the scene with the submarine towards the end of the episode, and the stage had to be refrigerated for five days.