At the start of Hollow City (which picks up right where the first book left off), the children are caught in a storm that destroys their boats and most of their luggage. They find refuge on a deserted island, and while trying to build a fire, this exchange occurs:
Horace: We can't find any wood for the fire.
Emma: Did you try looking in that forest over there?
Horace: Too scary. I heard an owl.
Jacob trying to explain to other children what crossing a loop sounds like to him. Twenty first century comparisons fall flat.
Miss Peregrine, trapped in bird form, has to pretend to be a wind up so the children can smuggle her onto a train.
The children jokingly mocking Enoch's obsession with London upon arriving in the city. He really did overdo his advertising campaign.
In the third book, Mother Dust is a peculiar whose body can be broken apart and used as magical dust. She gives Jacob and Emma one of her fingers to help them. Subsequently, whenever her finger is used against the wights, Jacob refers to it as "giving them the finger".
For that matter, the first time they try. Turns out dust isn't much of an offensive weapon.
While an Awesome moment as well, there's something hysterically funny about Bentham, The Dandy, charging into the fray on grimbear's back and bellowing like a madman.
This exchange, an example of sibling rivalry:
Caul: I was a quicker study than you, remember? Aswindan. The root is wind, which denotes [...] strengthening, invigoration! Bentham: I'm not so sure about that, brother. Caul: Oh, you're not. I think you want it for yourself! [beat] Bentham (deadpan): Aswindan. Root word swind. Meaning shrink. Caul: No. No, I'm certain I was right. Alma: You're not. [Caul glares]
Emma mistaking a fantasy convention member for a peculiar. Two conversations happen, with no side having any idea that the other doesn't know what they're talking about.
When discussing loop theory, Emma and Enoch have this exchange:
Enoch: Which is why you cant go back and kill baby Hitler to stop the war from happening. History heals itself. Isnt that interesting?
Emma: No, and youre a heartless ####### for talking about killing babies at a time like this. Or ever.
Mr. Barron's final threat to Emma as she holds him back with her breath.
Mr. Barron: Eventually, you're going to run out of breath! And then it'll all be over! Death for your beloved Jake and Miss Peregrine! Everlasting life for me! [sniffs the air] Eww! And a mint for you!
It's worth mentioning that as he's saying all of this, pinned to the wall with Emma's breath, he has his arms crossed- and then when he uncrosses them, they get blown back against the wall. Not long after, his lips actually start flapping in the wind.
Horace tries to hold Barron off by projecting images of birds around him. Barron pretends to scream in agony and then breaks down laughing. He then notices Horace's suit.
[Barron looks at Horace's suit appreciatively] Barron: You must put me in contact with your tailor. [Casually tosses Horace out of the way]
Mr Barron complaining to the other Hollowgasts and Wights about his time undercover as Jake's therapist... in Florida. The fact he treats the whole thing as a Fate Worse than Death makes it doubly hilarious.
Mr. Barron: I had to masquerade as a psychiatrist for three weeks in Florida! Have you ever been to Florida?!
Later, he laments spending "two, no three days in Wales pretending to look at birds."