That Gon/Killua/Hisoka moment is probably one of the funniest in the series. I especially like Killua and Hisoka's reaction to it.
And of course, the arm wrestling is great. Nobunaga shows his human side and Gon gets angry.
Overall, I really like this bit where we as the reader know of both Gon and Killua's story and of Kurapika's story, but the actual characters don't. And now both story lines start to merge, without the characters knowing. Killua realises that in this chapter too though.