“I consider this person a resource for me. In the event of an attack on the flight or on me, these are my ‘go-to’ people,” Bridger explained.
“If a situation looks like it could develop, I’ll privately and discreetly ask one of these people if they would be willing to help us if necessary.
“Help might involve subduing or restraining an unruly passenger. We hope it never happens, but we will prepare just in case it does.”
Of course, if you look like trouble, the cabin crew will also notice.
“As passengers board, the flight attendants are already sizing them up,” wrote travel expert and author Christopher Bartlett in his book Plane Clever.
“They are noting any who might be already intoxicated – they should have been filtered out at the gate.”
source: express.co.uk