In Episode 2, when Ayaka has the Tower Witches tied up, she asks Takamiya if she can burn them. His response of "No" is hilarious.
The quick scene of the Tower Witches singing karaoke. Bonus points on the song's lyrics.
Honoka attempting to use a spell near the end of episode 10. The scene is serious, with appropriate music to match. Then Ayaka headbutts him out of nowhere, complete with a funny sound effect and Honoka with Circling Birdies.
In episode 12, Tanpopo ends up helping Kasumi. When the latter wakes up, she assumes that she's being kidnapped by the former, and orders her bear, who had asked Tanpopo for help in the first place, to beat her up. The bear is understandably reluctant, but Tanpopo's rabbit tells it that it's okay and to obey it's master. So the bear reluctantly knocks both the rabbit and Tanpopo into the air.