In a tone of dreariness that could put Eeyore to shame, "Look's like that, doesn't it? Learn something new everyday." Rincewind pats the lid. "Good Luggage. Remind me to find you a wardrobe for sleeping on. I think you've earned it."

It takes a solid minute for the implication of heights to settle in like a ton of bricks. Going pale as a ghost, Rincewind stiffens and tries to crawl further ON the Luggage. He decides that looking up at the ceiling was a better, safer experience...

"Don't look now, but I think we're about to become closely acquainted with one of them stalac-thingies."