Ensemble Darkhorse: WatsonPritchett for his hilarious one-liners, being the smartest and most useful character in the movie, and being a likeable, sympathetic character. Almost everyone finds themselves wishing he lived with Sara or Eddie dying.
Esoteric Happy Ending: The movie ends with the final two survivors escaping the evil ghosts of the house by climbing the tower and leaving through a window. Cue the sunshine and "we're alive!" hugs. They're still both stranded on top of a haunted house which is itself alive and will devour them the moment they go back inside, with no way down except a 200 foot drop off a cliff and no one coming to their rescue. How are they getting out of there again? Although if one takes the events of the second film, they were able to get off the top. Somehow.
Uncanny Valley: Invoked with ghosts via Undercranking to make their movements twitchy, deranged, and horrifically fast. Also, several ghosts like Vannacutt and his medical staff often look like they stepped straight out of an old 8mm film reel and into the decidedly higher-quality world of the rest of the movie.