The talking head riff in Rennie Harlin's Exorcist Prequel.
It's on record that Blatty did not like "Exorcist The Beginning" and prefers "Dominion" but has there ever been any comment from him about that film lifting the talking head dream from "The Ninth Configuration"?
Blatty kicks himself to this day for selling the rights to "The Exorcist" characters to Morgan Creek but surely they don't have the rights to rip off films they haven't paid for?