The American ending of the Descent, if I remember correctly, has the heroine returning to her car, only to see the ghost of one of her friends. This is to say that while she is safe from the cave, emotionally and mentally she is haunted by what happened. Therefore, she's screwed for the rest of her life.
The European ending is a bit better and somewhat more grim. It adds to the American ending - she sees the ghost, and then sort of wakes up back in the cave, I believe in one of those feeding pits she ended up in earlier in the movie. Her mind mentally boned, she visions her daughter and that damn birthday cake while the creatures surround her, ready for the kill. Again, she's royally messed up in the head, but this time, she's going to (most likely) get eaten.