Oh the sarcasm's thick, isn't it.

Killua sitting makes him stare for a moment before- sitting up himself. He goes as far to direct himself over and around cards to- sit on the other side of that thick glass, right infront of him. His legs cross under him, hands resting in his lap.

Also the joke is he is surrounded in cards Killua. Did you get that. They are literally everywhere.

But whatever.

"I don't have it in here."