In chapter 208 Kanda returns after the traumatic experiences of the last arc. But as Leenale finds out firsthand he didn't change much.
In the same chapter, when he drinks the Crystal Innonence out of Lenalee´s hand.
Kanda: I feel like... You've become quite ugly...
In chapter 209 Johnny is caught by some Crows after trying to leave the Black Order with his memories intact. A boot suddenly bursts through the window of another train. Turns out it was Kanda, who has now beaten the Crows to a pulp because "You can't be too careful with Crow." Not to mention the aura around Kanda when he says this looks suspiciously like Black Allen's poker aura.
In chapter 210 there's a scene where a random guy in a bar hits on Kanda thinking he's a girl. Kanda hits him in response.
Kanda being overwhelmed with the desire to slice a street clown, unaware it's actually a disguised Allen.
Allen's face when he thinks Kanda has discovered him.
Also, in chapter 210 there appears a random gangster who, according to his crony, "loves all beautiful things to a sick degree," and decides that Kanda is the most beautiful person he has ever seen and declares, "I'm going to kidnap him and bring him back home!" Kanda promptly beats him to a pulp.
Komui can be so funny sometimes. For example, when he repairs Allen's arm for the first time, he has this huge drill. And then he causually starts to drill Allen's arm while Allen is sitting there traumatized.
Akuma: "What the hell was that for, you bastard?!"
Allen: "You expect me to just wait? I'll shoot you when I have a chance!"
When we first see Miranda after her training, she is in the process of making a dramatic and epic grand entrance... when she trips and falls.
Then she debuts her abilities with her Innocence—making a wreck of a boat just like it was back in its heyday—much to the shock of everyone. She thinks everyone is disgusted (when they're really in awe) and then jumps into the water thinking she failed.
And then later, when it's revealed that her powers only lasts as long as that Innocence is active—meaning that she has to have it on her for five days—she reveals that she can stay up for long periods of time due to how much she berates herself while everyone else looks in horror as she laughs at how she stayed up for a whole week calling herself useless.
In one of the filler episodes, Kanda gets pwned by a door.
Tiedoll telling Kanda to stop being an "anti-social humbug" and to "think out of the box more" counts.
The entire episode where Tiedoll's team explores a house with tricks and traps.
Allen cheating at poker. Cute though he is, that boy has a definite dark side...
Cyril once said that Tyki's beauty arouses him, with Tyki replying "You're giving me goosebumps."
The scene with Lavi blushing and giggling like a fangirl when Kanda finds out Lavi was messing with his hair.
The Lightning Glare occurs repeatedly between Allen, who can normally get along with anyone, and the notoriously grumpy Kanda. Even their golems get involved, with Timcanpy and Kanda's golem also engaging in a crackling glare contest of their own as they hover over their respective masters' heads. Until Timcanpy just goes ahead and eats Kanda's golem.
For all those with a sick sense of humor, all the Bloody Hilarious moments in the Alma-Kanda arc. A kid's arm falling out of nowhere shouldn't be that funny.