Yelled while he and Liz are having a nicely choreographed battle against the zombie barman, hitting him with pool cues. The fact that Shaun accidentally hits himself in the head with his cue just makes it funnier.
Meanwhile, Dianne and Shaun's mother are in the background watching the fight while grooving to the music.
Pete chewing out Shaun and Ed after getting woken up by them DJ-ing in the living room at 4 AM.
For that matter, there's the special alternate "clean" version of that scene included as a special feature on the DVD, where (because of contractual obligations) Edgar Wright had to make an honest attempt at rewriting that whole exchange without any obscenities. The result?
Pete: No it's not. No. It's funking Sunday, and I've got to go to funking work in four funking hours because every other funker in my funking department is funking ill. Now can you see why I'm so funking angry?! Ed: Funk yeah!
This troper went to a screening of all three Cornetto Trilogy movies, and at the start of Shaun, Wright told the audience to clap every time "fuck" was said. By Pete's speech, the whole theatre was applauding.
"It's not hip-hop. It's electro. Prick."
The fence hopping scene, too.
The scene where Shaun rants about how there's nothing left of the real Phillip now that he's a zombie, just as Phillip manages to turn off the blaring radio.
Shaun and Ed's plans for the zombie invasion, culminating in killing Phillip apologetically with a shovel and having a casual cup of tea. Things didn't exactly work out that way. . .
More to the point, they keep going over the plan, streamlining the imagined scenarios more and more to the point where a heartfelt and drawn-out apology to Philip devolves into just "Sorry! *bonk*"
The bloopers for that scene are hilarious:
Simon Pegg: "Sorry, Phillip!" *Forgets to pull his swing and actually whacks Bill Nighy in the head* "...oh, god, I'm so sorry!"
Then, in another take...
(Shaun and Ed enter the room with weapons raised)
(Shaun and Ed advance, when suddenly...)
The earlier prediction of what to do that day is a little more accurate though:
A Bloody Mary first thing, a bite at the King's Head, a couple at The Little Princess, stagger back here and bang...
back at the bar for shots.
And the scene where Shaun and his friends run into another Five-Man Band of survivors who are essentially all of them, as played by much more expensive actors.
The entire walk to the mart on the morning of the apocalypse. Shaun walks through his usual morning shopping routine, in an exact replication of The Oner from the movie intro, without noticing that he's in the middle of a Zombie Apocalypse.
Ed's reaction to seeing a hole punched through a woman's stomach.
For that matter, Shaun's expression when Ed hits a zombie over the head with an ashtray and caves its skull in. And Ed himself:
"Did you see his head go?"
Shaun trying to take down a zombie with a tetherball.
The blooper for this scene is also great, as he accidentally wraps the tetherball around the boom mic.
Even funnier in the alternate takes: "Big old gash." "Loves giant root." "More holes filled with pearly-white spooge." "Big old muff." "Ropey old twat." Simon Pegg couldn't keep a straight face.
Made even funnier/squiky because that's Nick's mother-in-law.
Shaun and Ed trying to take out Mary and the other zombie in their back garden...by flinging records at them. Made even funnier by the fact that they're arguing over which ones to throw and which to keep.
Shaun and Ed not realising that the woman in their backyard is actually undead.
Shaun: Oh my God... she's so drunk!"
The scene where a zombie wanders into Shaun and Ed's flat because they left the front door open.
OH GOD, HE'S GOT AN ARM OFF!
Ed's almost casual confirmation that the lipless zombie and Mary are still at the window.
Shaun's "inspirational speech" to the other employees at the electronics store:
"Now, as Mr. Sloan always says: There is no "I" in "TEAM". But there is an "I" in "PIE". And there's an "I" in "MEAT PIE". It's, uh...the anagram of "MEAT" is "TEAM"... Look, I don't know what he's talking about..."
The team practicing before blending into the audience of zombies in order to reach the Winchester Pub. Barbara's turn to pose as a zombie is priceless:
Barbara:[Thousand yard stare]
Dianne: Barbara, that's excellent!
Barbara:[Suddenly returns to reality] Sorry, dear, I was miles away.
Shaun and Liz take refuge behind the bar, leaving a bitten Ed stranded across the room in a crowd of dozens of zombies.
Shaun: Ed! Ed!
Ed:(Dynamic Entry over the bar, covered in blood and bites) WHAT?!
Ed "somehow" crashing the car the gang was already using, forcing them to take Phillip's Jaguar like he wanted. They were parked at the time.
From the commentary, Edgar Wright revealing that the "We're coming to get you, Barbara" Shout-Out went completely over George Romero's head at the premiere, with Wright himself having to explain it to him when they chatted afterwards.