In Bruges (2008)

Continuity mistake: When the barman pulls Ken a fresh pint, the pint is placed on the bar and the glass is not entirely full. The camera changes angle and the glass is now full.

Revealing mistake: During the final shooting, a bullet hits a lamp post, causing a spark. A grey tape glued over the original metal surface is noticeable to help produce the spark.

Sacha ★

Deliberate mistake: The priest that Ray kills doesn't stagger out of the confessional booth toward the little boy until he's already been shot twice, yet when Ray sees the boy he accidentally shot, he is still kneeling in the prayer position and therefore did not move or react whatsoever to the first few gunshots only a few feet away.

Ken: You coming up?
Ray: What's up there?
Ken: Well, the view.
Ray: The view of what? The view of down here? I can see that down here.
Ken: Ray, you're about the worst tourist in the whole world!
Ray: Ken, I grew up in Dublin. I love Dublin. If I'd grown up on a farm, and was retarded, Bruges might impress me. But I didn't, so it doesn't!

Ray: Why didn't you wave hello to me today when I waved hello to you today?
Jimmy: I was on a very strong horse tranquilizer today; Wasn't waving hello to anybody. Except... Maybe to a horse.

Ken: Harry, let's face it. And I'm not being funny. I mean no disrespect, but you're a cunt. You're a cunt now, and you've always been a cunt. And the only thing that's going to change is that you're going to be an even bigger cunt. Maybe have some more cunt kids.
Harry: Leave my kids fucking out of it! What have they done? You fucking retract that bit about my cunt fucking kids!
Ken: I retract that bit about your cunt fucking kids.
Harry: Insult my fucking kids? That's going overboard, mate!
Ken: I retracted it, didn't I?. Still leaves you a cunt.