* When another club at Haze tears down the Go recruitment poster, Hikaru charges at them with a ''mop''.
* While Hikaru is trying to teach Akari Go, she moves the stone surrounded by black stones out of the circle. Cue Hikaru yelling at her that she can't do that.
* While Hikaru is in Insei, he and Sai try to finish their match with a player so that they can watch Akira face the Oza. Just when they think they can get away, the opponent and an instructor start analyzing the game.
* The beginning of Episode 66 where a chibi Sai goofs off, complete with cardboard cutouts of chibi Hikaru and Akira.