Those words were typed once before, by David Lynch: "page 127, then when you think nothing could be creepier than the soot men, that thing crawls in her mouth."
Check out entry two in this article about Mulholland Dr, with screenshots showing Sheryl Lee and the actress who played Ronette Polaski sitting together in Club Silencio.
Maybe it's DoppleCoop without BOB for the first time. It even got me wondering if when he looked in the mirror it was BOB saying to DoppleCoop "Good you're still with me" rather than the other way around.