The eyes of the Luggage roll up to fixate on Yosuke as if it were actually considering something, well, devious. To Rincewind's relief, the Luggage slows its ascent right at the lip of the cliff, or whatever it could've been called, and settles into a hover.

It then jostles, just enough to terrify its passengers. No one (except maybe its master) hits it without consequences.

"Aauugh! What'd you have to hit it for? I could've rolled off!" Rincewind yelps, clinging for dear, sweet life.