In the wrestling business, the term selling refers to making hits and manoeuvres look real and impactful. During the battle between Flash and faux Doctor Light, Barry does his best to sell the hits fired by Linda even if they happen to be far from the mark. The fight itself was a hugely enjoyable one, with the dialogue exchange between the pair adding to this staged fight. Of course, the aim of this fight was to entice Zoom over to Earth-1 in the belief that Doctor Light has killed The Flash, but such was the fight that Zoom apparently wasnt falling for that ruse.