Right after checking in you find out when the buffet opens in the morning: When do you start serving breakfast?
The lady in the breakfast room turns towards you (when), ducks down (do) because her judo belt has fallen off (you), and comes back up as if out of the starting blocks (start). It begins, she says, as soon as the tiny napkins with the ring around them are on the table (serving) – but in the morning they first break bread together here and fast for another quarter of an hour (breakfast).