Chowder's not only cooking up food, but also nightmares.
The episode "Cream Puff Hands" where chowder accidently gets his hand puffed till its bigger than his own body and while Mung and Shnitzel try and fix the machine chowder goes around town and helps everybody which he starts enjoying but soon he becomes mad with power and decides to make it bigger to the point where he starts to cause chaos and when Mung tries to stop him Chowder makes a really monstrous look on his face and says in a really creepy high-pitched voice "I WANT TO HELP THE WORLD!" Thank god Mung stopped him before he causes even more world ending chaos!
From "The Moldy Touch"
Mold: "You've just made it a million times better." Chowder: "A Million times!?" Mold: "You wanna go for a billion?" Chodwer: "YEEEEEEEEAH!!!"
Ms. Endive when she has her Ax-Crazy moments. Most noticeable is in the episode "Shnitzel Quits" when she almost eats him!
Panini's nutjob face in the same episode while saying "Chowder" over and over deserves a mention.
In "The Froggy Apple Crumple Thumpkin", when Chowder gets confused when Mung is explaining the recipe, a bunch of images flash. Some youtubers slowed down the clip to see the images, and some are a bit creepy. Like, not scary, but an eerie feel. There's also a picture a youtuber put out that was a bit scary when you thought about it, and the audio backwards is just weird. Childhood ruinded, in my opinion. Look at it here: https://www.youtube.com/watch?v=vIpmQYk-H2I
In the episode where Gazpacho thought he accidentally killed Chowder, he makes a dummy made out of meat that looks like him. He panics wondering if Mung and Truffles would find out that Chowder is [not] dead, and then the dummy spoke to Gazpacho: "Oh, They'll Notice."
The Lollipop Man in "Broken Part" turning from jolly to psychotic when Chowder doesn't have enough money to buy a pair of feet for Mung's feetza machine.
Lollipop Man: 23....SKIDOOOOOOO!!!!!!
Hell, he was terrifying BEFORE he got angry!
That dancing Minotaur from the episode "The Deadly Maze".
Also, that face Chowder makes at the beginning of said episode. Those eyes
Gazpacho in "The Spookiest House In Marzipan" The way he scares the kids is sickening.