LIST! :3

I'm attempting to list all of the bad stuff that Flippy has ever done on HTF:
Choked Flaky
Used Flaky as a weapon to kill Cuddles, and then both of their head fell off
Strangled Flaky, picked Flaky up and threw her in a fire
Sliced Flaky's head off when she was sticking her head out the car window
Flattened a tire of Flaky's car
Used a jack to screw the eyeballs out of Flaky's skull
Ran Flaky over with her van and laughed evilly
Smashed Flaky's head through a window and attached a knife to the wind-shield wipers so it cut half of her face off
Garroted Flaky
Killed 3 people at the carnival when they were on an airplane ride
Blew up Nutty's head
Put Petunia's brain in the fire and popped it
Used the guts of someone he killed to strangle Giggles
Snapped the head of a beaver
Stabbed spikes into Petunia's body, but she was still alive so he put a bomb in her hand and blew her up
Chopped off the low half of Mime
Stuck a camera through the beaver's head and lens through his eyeball
Came back to life when he was run over and tried to murder people
Cut off a slice of the beaver's face and it looked like a slice of cake
Tied balloon strings around Cuddles' neck and then the balloons got caught in the fan and ripped Cuddles to shreds
Peeled off the fur/skin of Nutty
Force ketchup and mustard bottles into Giggles' ears, making it come out of her nose
Slammed Petunia's head on a grill, frying off her face
Stabbed a straw into Cuddles' chest, making him bleed to death
Set the whole place on fire
Forced a torch down Mime's throat, making his whole body catch on fire
Stabbed an anteater a bunch of times, making him bleed to death
Smashed a couple of animals to a wall with his truck
When the anteater hid in a barrel full of water, Flippy closed the cap, stuck knives into the barrel's sides, pushed the barrel down the hill and smashing it against a tree, killing the anteater.

And I'm sure that there's many more things that can be added to that list...