Usually, that sort of thing happens to me after the reading. I'm "dream reading" several what-if scenarios. Or continuing the story. That sort of thing. Sometimes it's really hard for me to figure out what I really read and what was just my imaginiation.
When I'm really tired, the words get all blurry, I miss lines or read the same one again and again. I know by now that there's no use trying to read on.
