"... if you are a student you should always get a good night's sleep unless you have come to the good part of your book, and then you should stay up all night and let your schoolwork fall by the wayside, a phrase which means "flunk.""
“It's a dangerous business, Frodo, going out your door. You step onto the road, and if you don't keep your feet, there's no knowing where you might be swept off to.”
-- J.R.R. Tolkien, The Lord of the Rings