Drugstore Cowboy (1989)

Matt Dillon and...Patricia Arquette?—go on a drugstore-robbing spree so they can feed their prescription-drug habit. I think they stay in motels, and at some point somebody's in the ceiling. Are they hiding in the ceiling? No, I think they put a dead body in the ceiling. Whose? There's another guy, a third junkie. Is that who they put in the ceiling? At one point in this movie they talk to William S. Borroughs, maybe.

Oh, right, Heather Graham! I bet they put her in the ceiling.