While reading this book:
I realized something that hadn't hit me before: the parallel between Mark 4.35-41 and Jonah 1, which I suspect were in Mark's mind when recounting this episode.
Both Jonah and Jesus are asleep in the boat. In both cases, the mariners (in the Markan story, the disciples, of course, are the mariners) waken a sleeper. But while in Jonah, the man must be thrown overboard to still the waves, in Mark Jesus does not need to be overthrown -- he stills the waves and wind by His command.