Flight attendants are also on the lookout for passengers who could have a positive impact on the flight.
Bridger said crew keep an eye out for passengers who look strong.
“If I see someone who is muscular, powerful, strong, physically fit, I memorise his/her face and make a mental note of where they are sitting,” she said.
However, this assessment isn’t for the crew’s personal interest. A strong person could prove vital if something goes wrong during the flight.