Some years ago in America, a new RV owner, read the manual and set off for a vacation. Onto the highway, set the cruise control, then, as the manual said, "Sit back and relax" decided to go and make a coffee, and sit back and relax! The inevitable happened, and, in due course the RV owner sued the company for compensation, claiming that the manual was followed to the letter. The judge agreed and awarded substantial compensation to the RV owner. Only in America. Driverless cars!