There are those rare movies that are just consistently brilliant or relentlessly terrible from start to finish, but most films fall somewhere in-between, pinballing between good and bad and leaving the audience to decide how the balance shakes out at the end.
It's also uncommon that a single scene is so unconscionably unbearable as to sink an entire movie, and yet, as evidenced by this list, it absolutely happens.
Sometimes one scene can be so poorly thought out, ill-conceived, and gaudily executed as to ruin any goodwill the movie might've mustered up that point.
These 10 horror movie scenes weren't merely a little awkward or embarrassing - they left audiences slack-jawed and questioning quite what the hell they'd just witnessed, and second-guessing their verdict on the entire film.
From soul-shatteringly terrible one-liners to atrocious endings, god-awful CGI reveals, shambolic product placements, and groan-worthy exposition dumps, these scenes were very much the straw that broke the camel's back.
Whether you were enjoying these movies or just utterly indifferent to them, these scenes marked the point of no return where everything went straight down the damn tubes...
10. "Do Your Thing, Cuz" - Texas Chainsaw 3D
Texas Chainsaw 3D admittedly isn't a particularly good movie at even the best of times, but there's a single moment which sees it metamorphose from merely watchable trash to downright unbearable.
The film makes the bold if perhaps misguided decision to try and reinvent Leatherface (Dan Yeager) as an iconic anti-hero, ultimately teaming him with protagonist Heather (Alexandra Daddario), who is revealed to be his cousin.
In the finale, Heather sides with Leatherface over the town's corrupt cops, and when confronting Mayor Burt Hartman (Paul Rae) decides to throw Leatherface's chainsaw to her deranged cousin, before telling him, "Do your thing, cuz."
You can't really blame Alexandra Daddario here - Daniel Day-Lewis himself couldn't make that atrocious line sound good, and it marks the point at which it was clear that the creatives in charge had no earthly idea what fans of the franchise actually wanted out of these movies.
The film's dialogue was never going to win awards, but c'mon, this line is something else. That it made it past the scripting, shooting, and editing stages of production to be witnessed by millions of embarrassed viewers is staggering.