Episode 30 is a long string of these; everything regarding Hibiki's post-traumatic test syndrome, Ellen's reaction to the self-playing organ, Ako being the butt of a joke for the first time in the series, and the entire sequence with the game show Negatone (the last one which may look familiar to some) all make for an unnaturally hysterical episode.
Hummy and the fairy-tones noisily eating while Otokichi talks about Noise in episode 37. The scene's a slightly Big Lipped Alligator Moment and that makes it even funnier.
The intro of the movie, which basically has Mephisto got arrested by huge horde of police for suspicious behavior in Kanade's house. The bailing out scene is right behind it, with Ako being her usual no nonsense self and basically translating his rambling in a way non-Majorland people understand.