Mayuyu stalking Minori/Minoru and getting horribly confused.
Minoru then convinces her that he's not a guy by running up to a nearby restaurant with cross dressers working as the waiters, walks up to a waiter who's on break, and calls him/her senpai. Mayuyu then exclaims that she thinks that really cool. Later on its revealed that the waiter gave him a job offer.
YMMV on this one, but this troper was highly amused by Minori's interpretation of Haruna's 'ghost' comment and the reveal, having taken it for another koan moment from one of the AKB regulars.
Aki-P snatching Minori's photograph away from under the other team captains.
Specifically, he was half out of his seat with his other arm held out for balance as he did so.
Kijima dropping his pen and chasing after it in the middle of his introductory speech to the "Gekoku Jou".
Okabe tells Minori that if she ask her to cosplay as Miku again, she'll kill her...only that the next day Minori and Hiroko caught her trying on the Miku outfit.