Pew Die Pie (upon seeing Hill Act 1): Hill? I love hills!
His reactions to the dead animals ...
Squirrels: Oh no! Not the squirrels!
Birds: Oh no birdies! What did they do to you!?
Ducks: That's a lot of you ducks. Actually I don't give a shit about the ducks.
(Upon seeing Sonic with his eyes closed) "Sonic what the fuck did you do? Tails is like 'Whatever, let's sneak up on him!'"
Hide and Seek
"WHY YOU CRYING TAILS? Go there? (Tails points to the right) Tails you can't tell me what to do! (Moves Tails to the left) You can't tell me what to do, you bitch! Don't you dare tell me what to do- (Sonic.exe appears) Oh sorry so sorry!"
What does he say when he sees Tails cry after Sonic catches him? "Tails, why are you crying? You pussy! Tails! It's just a video game, there's nothing to be scared or sad about!"
You Can't Run
"You can't run? Well watch me, I'm running right now. I'm running in real life, you can't see my feet, but they are moving."
"I can moonwalk, like a fucking boss!"
(Blood appears) "WHAT!? Someone ate too much tomato sauce. That shit is not healthy if you eat it too much".
... and I am a God.
"Are we playing as this bitch? Eggman, that's his name."
(After hearing the Kefka laugh after selecting Eggman) "SHUT UP GAME! Shut your mouth!"
(Sonic's appears on screen with "I AM A GOD") "Okay, I mean Sonic you're not that beautiful let's be honest (Static keeps on appearing and Sonic's face reappears) Okay okay I'm sorry you're god whatever you say whatever you say!"
During his playthrough of Shadow of the Colossus, Pewdie believes that he has to jump over a giant valley to get to the next monster. As he nears it on his horse, with the Pirates of the Caribbean music playing in the background, the horse suddenly stops right at the edge of the cliff and his character goes flying into the pit. Made more hilarious as the music cuts off with a Record Needle Scratch.
The end of part 2 of Afraid of Monsters. Oh god, Pewdie was terrified for two minutes, and with a cliffhanger of something so Nightmare Retardant that words cannot do justice.
Most, if not all of his montages. The captions help make an already funny moment into a downright hilarious one. Here's an example from his LP of the video game version of The Grudge.
In his playthrough of the Dead Space 2 demo, when he abruptly started to sing a Swedish lullaby while being attacked, before shouting 'BAM!' and using his epic stomping abilities on one of the creatures. Any time he screams 'BAM!' and uses the stomp ability in that short playthrough can be seen humorous.
How he reacts to any of his creatures from Spore after they're finished being...created.
Too many of his reactions from The Grudge game (which is known as a haunted house simulator) are hilarious.
Pewdie: *Running from Kayako* Uh uh run run! *Turns to see her crawling on all fours after him* UH UH RUN LIKE A MOTHERFUCKER! UH! Okay, yeh, yeh! No problem - uh - oh-! *Sees her coming up straight at him* - WABRABRABRABRABABRABABRABRABRA!"
In part six of his Ao Oni LP, Pewdie demonstrates that he really wasn't kidding about his awful memory.
In Part 3, appropriately titled (╯°□°）╯︵ ┻━┻ , is full of hilarious freakouts, whether it's from him being helplessly attacked by a grunt, luckily it's not real or after hiding from a brute, when he makes this exchange.
Pewdie: *As he's trying to dunk a barrel in acid* It will take some time but I'm fairly certain this will kill you. *hears brute* Wait, is he coming back? Why is he coming back? Barrel- *gets cut down, causing Pewdie to scream and drop the face-cam*
In the first part of the Black Forest Castle Amnesia custom story, when exploring a room he starts throwing objects that are blocking a wardrobe. When a grunt comes, he desperately tries to close the door, only to realize that he accidentally blocked the door with the stuff he threw around. And things go From Bad to Worse from there.
Pewdie: Ah! You stupid box, It was you! Barrels! Did you put the box there? You fucking barrel!
In part 3 when he is running away from a brute with Stephano, we get this gem.
In part 17 of his playthrough, there's an unintentionally hilarious moment when he mispronounces "Condemned" to be "Condom-ed".
The way he says "Here's Pewdie!"
The opening of the Doom 3 LP, in which he speculates just what "the most advanced technology ever concieved" is.
His response to "don't get excited and shoot people."
His first attempt at killing the Demon. Murphy has a field day.
In his playthrough of SCP: Containment Breach, in part 2, he gets freaked out by seeing SCP-106 coming at him, so he quickly shuts the door separating them, not knowing that it can walk through walls and doors. So when he turns away to gather items, he turns back around and is staring at the monster in the face just before it kills him. His resulting freakout is so big he falls out of his chair and accidentally flips his camera at the same time.
Pewds: *sees the monster emerge from the dark tunnel* Oh, not you! Close da door. Sup? Cool? Cool story bro. That's awesome. (gathers items and sees the monster afterwards before it kills him, causing him to scream and drop his face cam) Ahh! Ahh! Ahh! Aahh! He goes through doors?
In another part he tries to go through a room where SCP-173 is, but the door has a time-release lock. When he opens the door and waits a minute, SCP-173 appears right in front of him, causing him to freak out. Better yet, it appeared right after the siren of the time-release lock sounded. Shown brilliantly (as well as the moment above) in one of his newest montages.
Playing with Cry on one of the various Garry's Mod scare maps
Pewdie: "A crowbar!"
Pewdie: AHH! What?! Techno music?!
Another one in which Pewdie accidentally kills Cry with the crowbar after hearing the Stalker scream.
In his Ib playthrough, he finds a sign saying "beware of lips" next to a disembodied pair of lips on the wall, and proceeds to inspect the lips. When he inevitably takes damage, he proceeds to make a nonchalant face and calmly facepalms.
Also from Ib, when he finds out that Mary is actually a painting made by the same guy who created all of the gallery pieces. For a very long moment Pewdie just sits there and you can practically see the cogs grinding through his head before he cries out, "I knew it!"
From that same video, Pewdie rocking out to the Game Over music.
Similarly, in his The Witch's House playthrough, after a little trouble he makes it down the hall he's not supposed to be distracted in, and makes it to the game's save point. Only when he takes a step towards it he ends up trapped in a inescapable room and crushed by a boulder, getting a Game Over. This is made instantly hilarious by him delightedly yelling 'I MADE IT!!'.... followed by a nonchalant face and facepalm once he realises what has happened.
His playthrough of Slender is hilarious. It's hard not to laugh when he continues trying to escape Slenderman and runs across a chair that's been knocked over, leaving Pewdie to start calling it "Mr. Chair."
While using a voice interface on a chat program that uses the avatar of a pretty woman, he gets steadily annoyed with it to the point that he mutters out "can I slap you now?" Somehow, the chat program hears that as "can I f**k you now?" Pewdie's hysterics only grow when the chat program responds with "Yes" and a grin.
His playthrough of Cold Fusion has him running away from a monster. When he reaches the exit, he takes his time to look at the monster and taunt him...HOWEVER !!!, as soon as he tries to leave, the door closes (this is actually a bug), and all he could say is "no,no,no,no,no,no......".
Pewdiepie: A funny story? Heh. You bros wanna hear a funny story?
Pewdiepie: Alright. "Once upon a time, there was a rich man pulling along a cart full of treasure. His cart had broken down in the woods, but there came a passing hunter and his dog. The rich man pleaded to the hunter to keep a close eye on his cart, to which the hunter agreed. The rich man went to get a new-I don't like reading funny stuff when this fucking music is going on-to get a new cart. Meanwhile, the hunter kept watch. Night soon fell, and the hunter grew worried for his elderly mother still at home. So the hunter told the dog to watch the cart and went home to check on his mother. When the man returned, he saw the dog on guard. So he gave the dog a reward for his master, a silver coin, to carry in his mouth, The dog ran all the way home and brought his master the coin. But the hunter flew into a rage. "I told you to watch the cart, and what did you do? You stole from it!" So the master killed the dog.
Pewdiepie: That's not funny.
Pewdiepie: YOU EVIL BITCHES! THAT IS NOT A FUNNY STORY!
Pewds Does Everything
HOW TO BE A SALAD!
One tweet asks him to sing "I Dreamed A Dream" while eating a banana. He decides to use a lemon instead, and you can see from his facial expressions how hard he's trying to sing while dealing with the sour taste. He then tries to make a tear with the lemon juice, therefore bringing the lemon up to his eye.