Ghostbusters 2 Easter Egg - Disneyland in New York?

Near the end when the Ghostbuster's go to see the Mayor about the serious negative energy slime problem you see a shot of a plaque that reads Gracy(or Gracie) Mansion. The Haunted Mansion in Disneyland is known as the Gracy Mansion and the "biography" of the Mansion's Ghosts centers around the Gracy family.