"I was preparing myself for the worst" - Passenger on board United Airlines flight to Shannon

Imagine being on a smooth flight over the atlantic and out of the blue there's a sudden, uncontrolled drop. Passengers scream like they're on a funfair ride. John Dunton-Downer from London was on a United Airlines flight that had to make an emergency landing at Shannon Airport after hitting severe turbulence. Twelve people, including three children, were injured and taken to hospital. He told our reporter Dean McLaughlin he's extremely glad to be alive..