When the driver of a bullet train momentarily applies the brakes, passengers greet the reduction in speed with a slight, G-force-induced nod of the head, and not much else.
Unless, of course, the passengers in question are trying to break the Guinness World Record for the furthest distance traveled by train in 24 hours.
In that case, their reactions include quickly exchanged glances, anguished looks out the window and, if the braking continues, the burying of heads in Japan Rail train timetables.
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