Gon waits for the precise moment Hisoka attacks his own target, Agon. Using his fishing rod, Gon successfully snatches Hisoka’s #44 tag.
Hisoka kills Geretta and returns both tags to Gon. When Gon refuses to accept a "charity" victory, Hisoka punches him and declares he will only take the tag back once Gon can land a similar punch on him. Hunter X Hunter 2011 Episode 16
While paralyzed by the adrenaline of his success, Gon is paralyzed by a blow from Geretta, who had been stalking him. Geretta steals both Gon's and Hisoka's tags. Gon waits for the precise moment Hisoka attacks