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Hong Kong Airlines' cabin crews have been trained in a form of kung fu, to deal with disruptive travellers.

A spokesperson for the airline, Eva Chan, told BBC Radio 5 live: "Aggressive passengers have become a norm on long-haul flights nowadays."

You can hear other BBC Radio 5 live highlights by visiting the Best Bits section on the website.

Up All Night broadcasts seven days a week 0100-0500 on BBC Radio 5 live.