Mihoko attempts to print out records of her opponents' last matches, and ends up wrapped in the laptops' power cables while the laptops are sparking electricity and she knocked the rest of the computers on the network offline.
Mako, Tomoki and Miharu get fired up for a rematch against Kaori... and end up losing just as badly as before. The manga shows their being in a collective Heroic BSOD after the match, while the anime shows the three with Scary Shiny Glasses, while Kaori does not have them.
From Saki Biyori, Coach Kubo sends out a cell phone message to the Kazekoshi mahjong club.
Message: Kubo here. I know it's on short notice, but there will be no club activities today. Get yourself a nice relaxing day off. ^_^
Mihoko: What does (^_^) mean? Is it code for something? What does it stand for?
After Miyamori's vanguard match ends, Shiro asks Aislinn to carry her back. Aislinn responds by drawing a figure kicking another figure off.
Shiro: (deadpan) "Screw you", you say? How lame... (Aislinn smiles and waves while Shiro walks off)
Kurumi's reactions to Hiroe's taunting.
Hiroe: (to Haru, while gesturing to Hisa) It'll be bothersome if you lump me into the same category as her. We're on completely different levels.
Kurumi: Stop yakking and just report how much you won!
Hiroe: Um... It's 5,200.
Before the vice-captain match of the quarterfinals starts, Kinue reflexively kicks Etopen, mistaking him for a soccer ball and sending him flying into the air. It's also quite funny when, in the Zenkoku-hen anime, as she's apologizing to Nodoka, the announcers are trying to make sense of what's going on.
In Saki Biyori Chapter 25, Mairu tries decorating her journal entry with colored pens, but only has a red pen,and turns the entire page red. Cue her best friend Himeko trying to figure out whether she was trying to send her a coded message, and Mairu being completely confused at what Himeko is getting at.