G-Block Guard 4B: How in the hell does some douchey kid with bangs like a Shih-tzu rack up so much cast!?
There's something inexplicably funny about a "You gotta be kidding me" face Crow shows when he's told that the two guys he killed in two blows are "probably the strongest here". He then stands for several seconds motionless, before deciding on finishing the rest of the Undertakers anyway.
While on the topic of Crow, the way he insanely blushes and tries covering her up when seeing Shiro's assets for the first time is both funny and adorable.
Rokuro's behavior in episode ten becomes so over the top that it's hilarious. At one point in the episode he seriously looks like he came right out Higurashi in terms of narm and animation.
To top it all off he says this: "DON'T MESS WITH THE HUMAN CALCULATOR!"
It's even funnier in the uncensored version. Right when he enters the room he says "WHICH OF YOU! FUCKHEADS! SHAT ON! MY GODDAMN BOMB?!". "DON'T MESS WITH THE HUMAN CALCULATOR!" is now "DON'T FUCK WITH THE HUMAN CALCULATOR!"
Okay, pretty much everything he said was worth a chuckle.
The begining of episode eight has Genkaku blocking the entrance to a room that has no other way out. What does Yoh tell Ganta to do? Run away.
Let's face it; whenever Genkaku isn't killing, he's just being freaking hilarious. Hell, even when he's killing people he still is.
"How the hell have you not figured out that I'm a jealous psychopath?"