Flying over the more vertical parts of China last week there was what I call “bad turbulence” but probably ranks as medium-to-low to an aviator. This was mid-flight and not in takeoff or descent. I was slightly horrified to see my neighbour’s laptop levitate from the seat pocket to the ceiling in half a second, stay there for two, then slam back into his thighs, corner first. Two hours later he hobbled off the flight.

Just put it away.