One interesting fact that you all have over looked is that the Chair in the WDW version of the haunted mansion in the endless hallway room, is in the shape of donald duck. It takes a while to see it, but its clearly donald ducks portrait on the chair.
The mansion itself has great attention to detail. If you watch closely at night, you will see strange lights coming from the conservatory, and the bride wanders throught the mansion, you can tell by the illumination of a gandle glow in the mansion windows.
The Tombstones of the mansion are the names of the imagineers who created the place.
There were disagreements between the imagineers on whether the mansion should be fun, or scary. So the imagineers drew up there own set of plans for the mansion. Thats why the beginning of the ride is more scary, and from the ballroom on, the mansion is more kooky and funny.
The things on the roof are not chess pieces, so dont even bring that dumb rumor up.
The knight in the endless hallway was actually a real person who jumped out at people, but it scared way too many, and people begun getting out of the doombuggies, so they replaced it with an anamatronic.
There is an error in the ballroom scene, the women are leading the men, instead of vice versa.
Ok I think Im done.
Bri@n