Pretty much the entire episode "Where Lies the Engulfer". Zak and Doyle are at an abandoned town for Zak's "final exam". The two of them obviously need their own spinoff show because of the epic hilarious lines between one another. Granted, a fair portion of it is Nightmare Fuel, but their interactions still qualify.
How about the part of "Kur, Part 1", where Doyle walks into a fancy restaurant in England, sits down at the table of one of Argost's biggest sponsors, grabs the guy's lobster and starts chowing down while asking him about Argost. A little while into the scene, a waiter tries to hit him from behind, and Doyle just whacks the guy in the head with a serving tray without breaking stride. And then proceeds to beat the crap out of everyone in the room with little to no effort.
Doyle and the very out-of-shape Van Rook having a somewhat partnership in Season 2. Pretty much everything they say to each other counts as this.
You know what, let's just save time and say Doyle in general is a walking CMoF all on his own.
In "Once More the Nightmare Factory," with the family safe, Doc proclaims victory "for now." Then a huge cryptid rises out of water behind him.
Zak: Dad? Doc: No. I don't care. I'm not turning around to look at it. It's over. We won.
Van Rook summing up his opinion of Piecemeal in "Target: Fiskerton":
"Everything about you disgusts me."
"Munya, it appears we have lost. Naturally, I blame you. Take us home so you can hide your shame."
Why would Drew throw a tv? Because she gets in the zone.