Haunted Mansion relishes in bringing elements of the original Disney Parks attraction of the same name to the big screen, often with a deliberate attempt to invoke more horror than humor. That isn't to say the film's references can't be funny, but there's a darker element to Haunted Mansion's cameos and references, befitting the film's overall dark storyline. This includes one of the ride's most iconic elements, which every guest who's visited the ride has encountered.
Source：https://www.cbr.com/haunted-mansion-movie-ride-graveyard/
