When I first read Flann O'Brien's The Third Policeman it felt like it took a long time to readjust to the light of the real world.
I'm due for another trek up The Magic Mountain, but it seems like it fits this question. The way time seems to dilate inside that book is something else. Normally one might get lost in details or worldbuilding flavor, there you get lost in pacing and conversation.
Or is it /c/badposting law that we can only hope it wasn't Kevin Bacon?