The things which can pop into one's head at any given time. There are so many "catch phrases" utilized as a kind of short hand imagery over the years. From comic books, to television, cartoons, movies, sayings and nearly everything in-between. Thought it would be fun and interesting to start up a thread listing such kinds of sayings. I shall start off with some which I can instantly remember and everyone feel free to join in on the responses. What do you know, use or remember? If possible: list where the phrase comes from.

Comics:
Avengers Assemble
It's Clobberin' Time!
Flame On!
Don't Yield, Back SHIELD!
By the Vishanti!
Great Rao!
Great Caeser's Ghost
HULK SMASH
Sweet Christmas
Imperious Rex!
Great Neptune's Trident
SPOOOOOOOOOOOOOOOOOOOOON
Oh My Sweet Stars and Garters
I Am The Law

In Blackest Day, In Darkest Night,  No Evil Shall Escape My sight, Let Those Who Worship Evil's Might, Beware my Power... Green Lantern's Light

With great power, comes great responsibility

Cartoons:
There's no need to fear, Underdog is heeeeere!
When Sweet Polly is in trouble, I am not slow, it's Hip Hip Hip, and awaaaaay I go!
Cowabunga
D'ohh=th-th-that's all folks!
Scooby Dooooooby Doooooo
Ruh Roh
Zoinks
Jinkee's
Yabba Dabba Doo
I'm Smarter than the average bear
I tawt I taw a putty tat
Eh, what's up Doc?
I am The Terror that Flaps in the Night
Heeeeeeeeeeere I come to save the day!
Good Grief
You Blockhead
Oh My God! They Killed Kenny!
What are we doing tonight Brain? The same thing we do every night Pinky. Try to take over the World!

Movies:
To Infinity and Beyoooooond
Beetlejuice Beetlejuice Beetlejuice
It's Showtime!
They're heeeeeeere
Gooooooood Mooooooooorning Vietnam!
I love the smell of Napalm in the morning
Say Hello to my little friend
Hello, my name is Inigo Montoya. You killed my father. Prepare to Die.
Khaaaaaaaaaaaaaaan
A Martini.... shaken, not stirred
Yeaaaaah Baby, Yeah
You talkin' to me!?
I pity the fool
You gotta ask yourself one question, do I feel lucky? Well, do ya punk?
There can be only one
Take your stinking paws off me you damn dirty ape!
I'll be Back
We're on a mission from God...
It's good to be the King!

Television:
To Boldly Go Where no-one has Gone Before

Beam me up Scotty
Resistance is Futile
Make it so 
Engage!
Aaaaay (the Fonz)
Exterminate! Exterminate!
Heeeeere's Johnny
Up, Up and Awaaaaaay
Look, up in the sky, it's a bird, it's a plane, it's Superman!
To the Batpole
Quick Robin, to the Batmobile!
Danger Will Robinson! Warning Warning
Book 'em Danno!
Just one more thing...
Who loves ya baby?
De plane, de plane
Bazinga

You get the idea.