Cromartie High School/Funny

Freddie. Just Freddie, and everything involving him, such as him giving perfect drections inside a city when using an old world map that has the USSR in it!
Well, There's also just about every bizarre moment that warps the viewer's brain...which would be pretty much every moment after the five-second-mark of the first episode.
In the fifth episode, when Kamiyama accidentally sits on Takenouchi's lap.

Takenouchi: I wanna tell this guy to get off of me, but if I open my mouth, then I'll hurl.
Kamiyama (moments earlier): I'm being so disrespectful...I need to take off my hat.
Kamiyama also mistaking Takenouchi's motion sickness for, well, this: You're obviously pale and weak because you haven't eaten anything. Here, have this pudding! (One has to wonder just where he got the pudding from, since he obviously didn't have any bags or containers of any sort on his person before or after that moment.)

I forgot to mention the gorilla(s). Yeah...just watch it and everything should make perfect sense...if you're high.
Pretty much all of episode 6, especially the forest moment: "Oh my god! This is a non-sequiter!"
Fujimoto's encounter with an internet troll, which ingeniously utilizes three different forms irony for one truly hilarious moment.
The movie's chock full of this too. Especially the part where Uchuu Genjin Gorilla plays. And the final battle, complete with sound effects ripped from Starcraft or AOE.
Also from the movie:

Kamiyama: Don't be so selfish Hayashida. We're going to give these drugs to all of the needy children in the world!
Seven Hours Later, in a jail cell, Kamiyama: I thought we were doing a good deed...

HE ATE MY PENCIL!
- MAI HAZUBANDO. (NSFW)
The "random pictures" Hayashida sends to Maeda, culminating in a series of his date with a mystery girl (Maeda's mom). Not so funny on its own, but when read in the context of the series, I'm convinced that the entire 200 chapters before it were written just to lead up to that punchline.