What do flight attendants notice on board?

An old but popular Quora thread had wonderful replies. It shows the flight attendant work and in-flight experience

First, flight attendants check for intoxication. According to Sjaak Schulteis, a 30-year Lufthansa flight attendant, drunk customers can be turned away

If a passenger is drunk or high, he or she may be denied entry. [...] The first impression is typically correct, and we refuse individuals who could endanger the aircraft

So far I've refused four people and been supported by the purser and captain. They were all inebriated.

Intoxicated passengers should be turned away. Last week, an American Airlines passenger puked in first class.

Shreyas Parikh says on Quora, "We check a lot and it happens all at once."

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