God, what I REALLY hate is when they depict someone getting really quiet near the end of their sentence, effectively cutting themselves off, and THEN the other person speaks...
Like that's not even a realism fuck-up, that's just terrible directing.
Watched that terrible dracula on a boat movie last night, every scene between two people was an exchange of a perfectly spoken diatribe or 5 minutes of expositional speeches. Back and forth. Forever.
I can't understand why they don't attempt to make movie dialogue sound like real people talking. It's as bad as laugh-tracks in terms of breaking immersion and making it feel like you're watching a bad stage play.