Groundedpolly,... my new policy when seatbelts have been on for some time due appearance ahead (day) or radar indications (night) of likely turbulence.: When conditions indicate the sudden onset of turbulence..a short PA urging those people in washrooms to make there way back to seats in a timely fashion..whilst trying not to cause nasty accidents due rushing!!! As in ALL situations beyond the norm..good communication will always keep 98% of the folks happy! Depends on how much one cares about ones job me thinks.
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