One of the show's downright funniest scenes occurs episode 12. Fakir, after falling into a large trench with Ahiru/Duck, becomes heavily embarrassed and thus flustered when he learns Ahiru is actually "the" duck he consoled with while crying in episode 10. Since Fakir is usually as guarded as Fort Knox, this makes it five times funnier. The fact that Ahiru suddenly turns into a girl again and doesn't consider her nude status in front of Fakir until too late makes the scene only that much more hilarious.
When Fakir opens a door and pretty much every girl in the school falls in.
Ahiru flailing over Mytho in early episodes, made funnier by his nonchalant reactions.
Duck!Ahiru, plus Uzura, plus Fakir, plus water.
When Ahiru is "rescued" by Fakir in the boy's locker room.
Anytime Ahiru's friends Pike and Lilie try to help her in her lovelife.