I drove away from a pump with the nozzle still in the filler neck once. It was because we visited a station that offered to pump your gas for you (not in NJ), and after filling the tank the employee gave me an affirmative and walked off...without removing the nozzle. I had waited in the driver's seat, so I didn't know and it didn't occur to me that he might not finish the job. I stopped when I heard the clunk and put the nozzle back, no damage done. It was frustrating more than it was embarrassing.Maybe New Jersey not allowing people to pump their own fuel has it right, as annoying as it is.
Like @Danoff said, a deviation from your routine...