The line comes from Poltergeist, the 1982 supernatural horror film directed by Tobe Hooper and produced by Steven Spielberg. In the climax, Steve Freeling confronts his boss Mr. Teague after discovering their suburb was built over a former cemetery and only the markers were relocated, leaving the bodies behind. The moment explains the haunting and has been quoted for decades in horror discussions, parodies and memes about real estate scams, corporate greed and secrets buried quite literally beneath a seemingly perfect home.