90% of what Ieyasu, the Otaku, says qualifies as this.
Episode 6: Takumi and the girls are stranded inside a tent at the top of Mt. Everest and Takumi is slowly dying of exhaustion and exposure. After a heartwarming plea for Fumino and Chise to get along, his last words are to call out for his sister- who promptly arrives with a casual, "Yes?" and saves the group like it was no big deal.
Chise having to exercise her glutes while wearing bloomers in episode 8.
Episode 10: Finding out exactly what Takumi's "special training" was at the end.
The DVD extras as a whole, outside of the gratuitous Fanservice shots, but even some of those can count.