Jack tries to pick up speed, skidding around the corner into the school hallway outside the library door. Then it's just a very long, straight corridor, and if he doesn't get out fast, he knows Faith is likely to get him. And he really doesn't want Faith to get him. She'll regret that so much when she wakes up.

So he all-out runs, even though there doesn't even seem to be an end to the dream-hallway.