Emanating Minecraft Cave noises for no apparent reason.

Attempts to divide by zero. Her calculator explodes. "Dang it, that's the 6th time this week..."

"aaaaaaAAAAAAAAAAAAAAAAA--!"

Why is she so loud at 3 am Why is she so loud at 3 am WHY IS SHE SO LOUD AT 3 AM

"I CAN'T SLEEP UNTIL I GET ALL THE 'AH''S OUT OF MY BODY! AAAAAAAAAAA--" Why.

Blasting cow noises through the halls.

"HAAAAAAAAAAAAAAAA!!!! Nothing like a good midday scream to get the blood pumping!"

She's screaming again Why is she screaming again W h y i s s h e s c r e a m i n g a g a i n

"I don't understand why some Magical Girls struggle against witches... All you need to do is parry!"

"Sana-chan gets it."

"BULLSEYE!"

"TRY THE COOL NEW SPICY CRAB NOODLES!!!!"

Stands by Yachiyo Nanami ... ish.

Attempting to solve one of those wooden 3d puzzles.

"175... 176... 177..." Doing pullups on the rafters.

She's playing Extreme Jenga. The blocks are slanted instead of straight up and down. That, and she's hanging from one of the rafters for added "extreme" factor.

"WHERE'D MY SCOOTER GO?!"

"Momoko and Shishou are really going at it, huh."

"Huh, usually this is the part where they start kissing."