I learned the word "careen" from sea stories, where on long tropical voyages the hull
got so fouled, the ship had to be beached, where by tipping whole ship sidewise,
half of the hull was completely exposed for removal of the barnacles, etc. This being
done with ship motionless made it hard for me to see "careen" as describing violent
motion. And having learned "career" as curriculum vitae, which is seldom characterized
by rapid sustained change, I could not find it useful to descrive pedal to the metal
zigzag driving.