Answer:
If you are unsure how to use one then just ask a flight attendant.
Men in skirts blow into these.
What has a hundred limbs, sometimes leaves, but cannot walk?
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
I always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?