I am so disappointed in you.
- After the Reverend Green talked to the group, he gets called by his "supervisor" via the pub's telephone and gets told that he has to get killed because he was telling too much. For a second, you can hear the "supervisor"'s voice through the receiver, and it sounds terrifying:Hello, Trevor...
- Gary's mental state deteriorates over the course of the film and when Peter dies, he completely snaps and tries to finish the crawl at any cost, even going so far as to attack Andy when he tries to stop him having the last pint. It's scary from several points of view:
- Gary is constantly trying to rationalise everything back towards the pub crawl, because it's all he has left, but he also seems to be aware of his problem and seems to consider himself doomed to the same cycle for the rest of his life.
- Andy is forced to watch his friend lose his mind, someone he'd known since school, someone he'd considered the coolest guy on Earth, someone he'd once considered his best friend.
- It can be frightening for the audience primarily because it's unexpected from Simon Pegg, but because there are people like this in real life and may make younger fans who came to watch the latest of the Three Flavours Cornetto Trilogy scared of ending up like this.
- The sequence in the bowls club, for basically being a rapid-fire version of The Thing, as you suddenly realize any one of your friends could be an imposter... and they're thinking the same about you, and they're forced to dredge up memories of gruesome injuries and horrible accidents to prove they're really who they say they are.
- There's a scene where Oliver runs to the washroom, but once he returns he's different, audiences can subtly tell that he's one of them. When you watch it knowing that he's been replaced, this makes all scenes from here until the others figure it out at The Beehive quite creepy, as the characters don't seem to notice anything wrong.
- Also, taking into account what The Network does to the original versions of the people it replaces, this means that the real Oliver is long dead before anyone even notices that he's an imposter.
- Seeing that giant statue come to life.
- Sam seeing the man she had a crush on in high school as a blank, years after the original had died in a motorcycle accident. It's worse when you consider they did this just to tempt Sam, as they would have no need to create a copy of him since he moved away.
