20th Century Boys/Funny

"Give me some of your pheromones!"
That pink rabbit suit.
The scene where the engineer tries to explain the problems with the Friends' Humongous Mecha plan
The guys' horrified reactions to seeing that they included a pornographic movie poster in their time capsule.
In the middle of a very tense and dramatic scene a bunch of Friend's followers swarm Kingmart and manage to get Kanna away from Kenji's mother....and then the guy holding her panics, and tosses her like a football to the next guy, who does the same thing, until they're all basically playing Hot Potato with a baby.
In a serious moment Chouno sits at the shrine of his dead grandfather. After a heartfelt talk he resolves to follow in his footsteps and stands up. And promptly falls down. His legs fell asleep.
Poor Kyoko is basically a walking funny moment by virtue of having the worst possible luck a character can have without getting killed. Her facial expressions don't hurt.
- When Yoshitsune hands Kyoko an ID card, who's photo was taken when he took a picture of her in the bath.
When Kanna and Chouno got to see Father Nitani Chouno sarcastically mentions that he isn't going to ask Kanna on a date. Kanna replies, equally sarcastic, that the line sounds like it came from a romcom. Chouno's expression is priceless.
In the 21th Century boys' climax Kenji is riding his bike rushing to his destination when in a very serious and important moment...then his bikes runs out of gas and he falls off, Kenji was not happy at all.