Maybe it was to avoid getting seasick.
That thought never crossed my mind until this year. When my sisters and I took the ferry to the island of Izena, our cousin told us the ocean crossing can get rather choppy at times. She advised us to go up to the open room with carpeting and lie down there and sleep for the hour ride. You can completely avoid any discomfort that way, she said. And it was so true.
The story about Jonah being asleep in the ship...I wondered if he'd decided to catch a nap when his ship hoisted anchor and tried to avoid seasickness that way? Nah--he was probably feeling something else in the pit of his stomach.
Strange prophet, running from the God He knew so well and daring Him to prove Himself True!