- The whole door opening exchange in "No Fighting in the War Room!" in 4.
- In "Heat," Gaz's frustration with the helicopter pilot.
- Pilot: Bravo-Six, this is Gryphon Two-Seven. We've just crossed Azerbaijani airspace. E.T.A. is four minutes. Be ready for pickup. Bravo-Six, the LZ is too hot! We cannot land at the farm! I repeat, we CANNOT land at the farm! We're picking up SAM sites all over these mountains!Gaz: Oh, that's just great! Now, where are they gonna land now?Pilot: Bravo-Six, we're getting a lot of enemy radar signatures, we'll try to land closer to the bottom of the hill to avoid a lock-on.Gaz: Oh, he's gotta be takin' the piss! We just busted our arses to get to this LZ, and now they want us to go all the way back down?!
- USELESS WANKER!
- Griggs' first words when he's freed from captivity, along with Price's response:
- Griggs: 'Bout damn time. I was starting to think you guys were gonna leave me behind.Price: Well, that was my first thought, but your arse had all the C4.
- "Oi, Suzy!" *thwack*
- As a Call-Back to Worm's line in "The Gulag" in Modern Warfare 2:
Soap: Who the bloody hell is Yuri?
- When Wallcroft and Burns are advancing up the escalator in "Mind The Gap" a Russian rolls a grenade down the steps. It is pretty easy to avoid, but Wallcroft's over-the-top reaction is hilarious. It doubles as a Call-Back to the first entry.
Wallcroft: CHEEKY BASTARDS!
- Pretty much the entire Veteran/Noob commercial for Modern Warfare 3.
- Even better, it's Mason as the Veteran.
- In "Wolverines", you can set up the sentry gun on the roof of the restaurant to shoot at Russians that are coming up from an access hatch. However, just like when they rope out of a helicopter, if you shoot them on a ladder they skip the death animation and become limp and weightless ragdolls. If they climb up onto the roof still in the ladder animation when the sentry gun shoots them, there is a good chance that a Russian soldier will be blasted off, cartwheeling hundreds of feet into the air...becoming a little black dot on the horizon.
- When the EMP hits the East Coast and aircraft start dropping out of the sky like rain during the "Second Sun" mission, Corporal Dunn succinctly voices what players are probably thinking right then.
Corporal Dunn: "HOLY SHIT!!!
- A bit of unintentional humor in a mission where you have to protect The Russian President from an assassination attempt. You get him safely to the helicopter, and open the door only to be shot by Makarov, in a fashion similar to how he offed Joseph Allen in MW2. It became a bit of a mood disruptor when one started to half-expect that to happen every time someone went to open a door.
- In the Manhattan Stock Exchange, you see that everyone's stocks are dropping (obviously, since there is a battle in New York going on RIGHT NOW)... except for Infinity Ward, Treyarch, Activision, and Sledgehammer Games.
- Here's one from "Persona non Grata". "Yuri! We need to get Soap to the chopper!" *chopper crashes into the hospital room*.
- When entering the semi-ruined house on Brookmere Road, one of the first things you will see is a Russian soldier examining the contents of the fridge.
- Soap: "We'll stick out like bollocks on a bulldog."
- Meta-example : 2011 game of the year award on every game review websites are tense with Battlefield 3 and Modern Warfare 3 just asking for a final showdown we're all waiting for. Gamespot's best shooting game of 2011 award goes to Gears of War 3.
- In MW2, Pvt. James "DO EVERYTHING" Ramirez being ordered to effectively carry entire missions gets so overdone that it ends up being quite amusing.
- In the "Al Ghillied Up" level, if you destroy the helicopter at the Church (which you were not supposed to do—it being a stealth mission and all), Mac Millan will sardonically tell you to stop showing off.
- Makarov running over a hapless Russian soldier during Yuri's flashback.
- During the first level of the trilogy, you are ordered to knife a watermelon.
Gaz: Your fruit killing skills are remarkable!
Captain Price: That was an improvement, but it's not hard to improve on garbage.
- During the same level, one of Captain Price's quotes upon finishing the obstacle course.
- In "One Shot, One Kill", there's a chance where you can pass by some wild dogs eating a carcass. Letting them be will result in them attacking the enemy soldiers unexpectedly.
- Victor Zakhaev's death in Call of Duty 4 becomes unintentionally hilarious if you have "A Bad Year" cheat turned on. You charge towards him, and he shoots himself in slow-motion... and explodes into a pile of tires. Even funnier is Grigg's comment.
Griggs: Kid's got some issues.
- In Call of Duty 4: Remastered, as a nod to MW 3, you can Shoot Makarov to get an achievement and/or shoot Yuri for an interesting easter egg.
Game: Friendly fire will not be tolerated.
- If you activate the melon cheat in Call of Duty 4: Remastered, all enemy heads will be replaced with watermelons. Even in cutscenes! It's quite amusing to see Zakhaev glaring at President Al-Fulani up close, his scowl replaced by a big green watermelon.
- Furthermore, in "All Ghillied Up," MacMillan's head is replaced with a watermelon too. And he's labeled as "Cpt. MacMellon!"