20 Horror Movie Scenes That Make Absolutely No Sense

Plot: Six British women go exploring a cave system in the United States, only to become trapped. They then find themselves being pursued by man-eating creatures in the dark.

Even if The Descent is one of the better horror films of the 2000s, which was an infamously bad decade for horror, its inciting incident has always been a head-scratcher and always will be, no matter how brilliantly made the rest of the movie is. 

Once the group gets trapped, secondary lead Juno (Natalie Mendoza) reveals that she deliberately chose to go into an unexplored cave system rather than the one that was on the rescue plan they filled out with the authorities. As such, if a rescue party is sent out, they'll go to the wrong cave. 

Why on earth would anyone do that? 

Even if idiotic characters aren't exactly alien to the horror genre, Juno actually comes off as fairly level-headed and competent throughout both this film and its 2009 sequel, in which it turns out that she's impressively survived on her own in the tunnels for several days after her apparent death. 

If she'd been established as a more reckless character, this thoughtless decision might've felt more earned, but Juno was never depicted as such, and it remains a terrible bit of writing.