" GORDON WAY DRIFTED miserably along the dark road, or rather, tried to drift. He felt that as a ghost—which is what he had to admit to himself he had become—he should be able to drift. He knew little enough about ghosts, but he felt that if you were going to be one then there ought to be certain compensations for not having a physical body to lug around, and that among them ought to be the ability simply to drift. But no, it seemed he was going to have to walk every step of the way. "

― Douglas Adams , The Dirk Gently Omnibus (Dirk Gently, #1-2)