From Episode 5 of HxH or Hunter x Hunter (2011) anime series, "Hisoka × Is So × Sneaky" "Hisoka × wa × Hisoka", in English Subbed.
Kurapika and Leorio choose to escape by running in opposite directions. Leorio later turns back to face Hisoka, for he cannot stand to run away after witnessing such cruelty. Leorio attacks him, but Hisoka disappears in a whiff of smoke. Hisoka is about to reach Leorio when he is hit by Gon's fishing rod. As Hisoka walks towards Gon, Leorio tries to attack him, but is knocked unconscious with an uppercut. Gon defends himself while maintaining distance. He cannot attack Hisoka head-on so he uses a trick to distract him. Unfortunately, it is Hisoka who surprises him by reaching him from the back. Hisoka holds him up by the neck and enjoys Gon's pained face. He lets go when Gon is nearly passed out. Hisoka tells him not to fear for he will not kill his friend, and cites that both Gon and Leorio are worthy of continuing the examination, and offers to bring the unconscious Leorio to the next examination site after receiving a call from somebody. Hisoka leaves, carrying Leorio on his shoulder, and Kurapika approaches Gon.