An expert has shared two words airline passengers should never tell flight attendants.
Willis Orlando, senior product operation specialist at Scott's Cheap Flights, said passengers should never get to the stage where they are telling staff on their flight: "I'm drunk."
He said the two words should never be said even if intended as a joke due to safety issues on airplanes, Birmingham Live reports.
He told Yahoo: "Certainly a lot of us get very convivial with flight attendants and we want to pal around with them and make these kinds of jokes and we feel light-hearted - and maybe we make a joke about being intoxicated."
Mr Orlando said flight attendants have the right to kick passengers off a plane if they are drunk.
He explained: "They have to make a decision whether you're safe to stay on board. There are also things that they can do to penalise you.
"They could put you on a list of problem passengers - and this could all be misunderstanding if you make a simple joke."
The warning comes as international travel begins to resume, with more flights being operated by airlines across the entire globe.
Whether it is done deliberately or not, being drunk on a plane is a criminal offence and is considered one of the main reasons for aircraft diversions.
Acts of drunkenness on an aircraft face a maximum fine of £5,000 and two years in prison.
The prison sentence for endangering the safety of an aircraft is up to five years, according to the Civil Aviation Authority.
Disruptive passengers may also be asked to reimburse the airline with the cost of the diversion, typically ranging from £10,000 to £80,000 depending on the size of the plane and where it diverts to.
