Brian saves Dominic from being arrested by the cops and explains why:
Brian: I thought if I got in your good graces, you might let me keep my car.
Dom: (With a grin) You are in my good graces, but you ain't keeping your car.
Vince's attempts to woo Mia when it's clear she's interested in Brian. First he tells Brian to wash his car and wear a nice dress and that he'll put him on the street (As a hooker) and in response, Mia asks Vince about that resturant he wanted to take her and upon finding out everything she needs to know, she tells Brian to take her there and Vince storms out of the house.
Brian brings the Supra to Dom's garage for the first time:
Dom: What the hell is this?
Brian: This is your car.
Dom: I said a ten-second car, not a ten-minute car.
Jesse: You could push this across the finish line, or maybe tow it...
The Big "NO!" Edwin (Ja Rule) gives out when Brian passes him during the first race, and being dissed by his girlfriend after it.
Brian and Bilkins go to Barstow to meet Rome to convince him to join up for the mission. Rome's first response to finding out that Brian's not a cop anymore is to right hook him. Bilkins' first response is to sit down on a lawnchair and eat some popcorn until they're done.
When Brian and Rome confront Markham over nearly blowing their cover at the shipping yard, after it's all over, Rome steals his food.
Roman lighting the windscreen of Verone's cronies on fire so they can't follow them and blow their cover.
Roman mocking the two drivers with the Camaro and Challenger, after beating them in a pink-slip race.
Roman: Use them bus tokens, patna!
During the scramble scene, the cops are following the cars they gave to Brian and Rome. (Which have been wired with GPS). Unknown to them, Brian and Rome swapped cars with Tej and Suki during the scramble, so the cops send a helicopter and a whole army of squad cars after the cars they think Brian and Rome are in. Tej's reaction upon getting out of the car and seeing this is absolutely priceless:
Tej: Whoa, fellas, fellas. I know my tags are out of date, but damn!
Roman, in true grade school fashion, teasing Han about Gisele for over a minute, only for Han to shut him down in two seconds by using Roman's own words to insinuate that Roman is overcompensating because all his girlfriends have a lot of bling. Kind of a retroactive Tear Jerker given how things turn out for them.
Again, when Roman talks about Shaw's crew.
Roman: I'm sittin' here lookin' at these images, it's like we're huntin' our evil twins! Well look at this black dude right here he's handsome, clearly that's me! We got a white Hobbs, this is Han. Tej... an African in a beanie, that's like your Mini-Me man! (laughs) Yo Brian! (Brian turns to look at Roman) When did you do this photo shoot? (Brian laughs and flips off Roman) I'm just playin' man. I know you're the prettiest blonde around here, ha.
What's better than Tej and Roman treating each other like Bros? Tej and Hobbs trolling like bros. To elaborate: they go to a riverside car auction to get some cars, where a haughty English salesman shows up and instantly makes discriminatory remarks at them, mistaking both for kitchen helo. (It also did not help that the snob criticized Tej for not being a "Balla", and Hobbs for being a Military man.) As the chap left, Hobbs thought that Tej was Planning on stealing them and repeatedly refuses to let him do so. Cue the cars, a few minutes later, being delivered to their base and the salesman thanking Mr. Parker for buying the cars and asking if there's anything else he can do for them. Tej and Hobbs make him hand over his shirt, pants and watch, walking away with only his underwear (For consolation sake though, they did allow the poor fellow to keep the coat.)
When the tank shows up:
Tej: (With an Oh, Crap! face) Uh, guys, we gotta come up with another plan. (Beat) They got a tank.
Roman: I'm sorry, did somebody just say a tank?
Cue the tank driving by
Roman: So, who's got a Plan B?
Tej: "Plan B?" We need a Plan C, D, E; we need more alphabets!
During the tank chase:
Roman: Somebody do something! I got a tank on my ass!
Oh and before anyone forgets, just remember the words on the airplane's tail before dealing with the group's resident Motor Mouth: IT'S ROMAN, BITCHES!
Hobbs heading to a control station to get camera footage in a sewer. Two of the guards are obviously on Shaw's payroll and try to turn him away when it comes to ask for it. Hobbs sees through them quite clearly but subtlety tells them that "it would be ridiculous" if that was the case. Needless to say the guards quickly get the hint.
Brian's introduction, complete with the series' staple gear shifting close-up ...in a minivan.
While Dom and the rest of the crew (minus Letty) are discussing the plan to rescue Ramsey, Tej is busy playing on his smartphone. Becomes Fridge Funny when they are finally putting the plan into action, especially with the first shot of the sequence being the game that Tej was playing.
Roman begins complaining about how he should be the leader and come up with the plan. Dom immediately asks him on his opinion, prompting Roman to mumble how he didn't mean it right now. And as everyone else comes up with ideas, he keeps making excuses for why it wasn't him.
The plan to rescue Ramsey involves Dom, Brian, Letty, Tej, and Roman falling out of a jet in their cars and parachuting their way down. Roman chickens out at the last minute, and Tej activates his chute to pull him out of the jet.
Roman: Hey man, listen. I'm sorry to let you all down, okay? I'mma go ahead and stay up here.
When she saves Deckard, she insists he bring Owen along on the raid of the plane. Deckard refuses and Mum Shaw starts crying over not caring about family as he winces, closes his eyes and agrees... at which point, she instantly stops crying and smiles and Deckard groans "Every time...".
The Brick Joke with Roman not being on the top 10 most wanted list, even though everyone else on the team currently is. He spends the rest of the movie trying to prove that he's worthy of being on it.
Near the end of the film, right before the climax, Roman is complaining about the environment they are in (being Iceland), and mentioning how he "didn't recognize [himself]" when trying to take a piss. It comes back later when Hobbs picks him up and refers to him as "Shrinkage".
And before that, Deckard telling his brother to be careful because Owen doesn't have good luck with planes. Owen's reaction and response sells it.
Also, Deckard telling the kid "You're going to not want to see this" as he turns the seat away and beats up a guy who tried to shoot him. Afterwards, he looks at the baby, sniffs, frowns and asks "That you or him?" Cue the baby glancing at the beaten up guy "Him."
Before that, there's also his reaction to the guy trying to shoot Brian.
Roman Pearce, the series' Butt-Monkey, is being attacked and trying to flee, and yet can't escape his attackers. Why? He's driving an orange Lamborghini, something Tej lampshades to him:
Roman: Why are they shooting at me?
Tej: I don't know. Maybe because you're in a orange Lamborghini.
Roman: Shut up, Tej!
"Tea-and-crumpets eating, criminal summmmmbitch."
Roman and Tej spend the movie competing for Ramsey's affections. They finally lay it out for her at the end to pick one of them. Looking them over, Ramsey asks a simple question: "What's my last name?" As they both blink and stutter, she smirks that when they figure it out, she can consider one of them.